How many nuclear weapons does Russia have?
All figures for nuclear weapons are estimates but, according to the Federation of American Scientists, Russia has 5,977 nuclear warheads - the devices that trigger a nuclear explosion - though this includes about 1,500 that are retired and set to to be dismantled.
Of the remaining 4,500 or so, most are considered strategic nuclear weapons - ballistic missiles, or rockets, which can be targeted over long distances. These are the weapons usually associated with nuclear war.
All figures for nuclear weapons are estimates but, according to the Federation of American Scientists, Russia has 5,977 nuclear warheads - the devices that trigger a nuclear explosion - though this includes about 1,500 that are retired and set to to be dismantled.
Of the remaining 4,500 or so, most are considered strategic nuclear weapons - ballistic missiles, or rockets, which can be targeted over long distances. These are the weapons usually associated with nuclear war.
Chelsea: Roman Abramovich says he plans to sell club
Chelsea owner Roman Abramovich says he is planning to sell the club.
In a statement on the Premier League club's website, businessman Abramovich said he had made "incredibly difficult decision" which "pains" him.
The Russian will not ask "for any loans to be repaid" and said proceeds of the sale would be donated to war victims.
Abramovich had said on Saturday he would give "stewardship and care" of Chelsea to its foundation trustees following Russia's invasion of Ukraine.
That led to speculation Abramovich - who has loaned the club more than £1.5bn - would put Chelsea up for sale, and billionaire Hansjorg Wyss told Swiss newspaper Blick on Wednesday that he had been offered the chance to buy the club.
Chelsea owner Roman Abramovich says he is planning to sell the club.
In a statement on the Premier League club's website, businessman Abramovich said he had made "incredibly difficult decision" which "pains" him.
The Russian will not ask "for any loans to be repaid" and said proceeds of the sale would be donated to war victims.
Abramovich had said on Saturday he would give "stewardship and care" of Chelsea to its foundation trustees following Russia's invasion of Ukraine.
That led to speculation Abramovich - who has loaned the club more than £1.5bn - would put Chelsea up for sale, and billionaire Hansjorg Wyss told Swiss newspaper Blick on Wednesday that he had been offered the chance to buy the club.
Ukraine: Russian troops take control of key city of Kherson - mayor
Russian forces have seized control of a key port city in southern Ukraine, the mayor says.
Kherson is the first major city to be taken by Russia, after heavy fighting, since it invaded a week ago.
Its mayor, Igor Kolykhaev, said Russian troops had forced their way into the city council building and imposed a curfew on residents.
Several cities have come under intense shelling, with Wednesday one of the most destructive days of the fighting.
Russian forces have seized control of a key port city in southern Ukraine, the mayor says.
Kherson is the first major city to be taken by Russia, after heavy fighting, since it invaded a week ago.
Its mayor, Igor Kolykhaev, said Russian troops had forced their way into the city council building and imposed a curfew on residents.
Several cities have come under intense shelling, with Wednesday one of the most destructive days of the fighting.
Ukraine nuclear plant: Russia in control after shelling
Russia has taken control of a nuclear power station in Ukraine after it was hit by shelling.
A fire broke out at the Zaporizhzhia nuclear plant - the largest in Europe - and Ukraine said it was shelled by Russian troops.
Authorities say the facility is now safe and radiation levels are normal.
World leaders have accused Russia of endangering the safety of an entire continent, and Ukraine's president accused Russia of "nuclear terror".
US President Joe Biden urged Moscow to stop its military activities around the site, while Canada's Prime Minister Justin Trudeau said the "horrific attacks" from Russia "must cease immediately".
UK Prime Minister Boris Johnson said the "reckless" attack could "directly threaten the safety of all of Europe". All three leaders spoke to Ukraine's President Volodymyr Zelensky by phone.
Mr Zelensky, meanwhile, said Russia wanted a repeat of Chernobyl, the site of the world's worst nuclear disaster in 1986.
Russia has taken control of a nuclear power station in Ukraine after it was hit by shelling.
A fire broke out at the Zaporizhzhia nuclear plant - the largest in Europe - and Ukraine said it was shelled by Russian troops.
Authorities say the facility is now safe and radiation levels are normal.
World leaders have accused Russia of endangering the safety of an entire continent, and Ukraine's president accused Russia of "nuclear terror".
US President Joe Biden urged Moscow to stop its military activities around the site, while Canada's Prime Minister Justin Trudeau said the "horrific attacks" from Russia "must cease immediately".
UK Prime Minister Boris Johnson said the "reckless" attack could "directly threaten the safety of all of Europe". All three leaders spoke to Ukraine's President Volodymyr Zelensky by phone.
Mr Zelensky, meanwhile, said Russia wanted a repeat of Chernobyl, the site of the world's worst nuclear disaster in 1986.
War in Ukraine: Zelensky slams Nato over rejection of no-fly zone
Ukraine's president has attacked Nato leaders in a fiery speech over their refusal to implement a no-fly zone around the country.
In angry comments, he said the argument reflects the "self-hypnosis of those who are weak, under-confident inside" and that Western reservations indicated that "not everyone considers the struggle for freedom to be Europe's number one goal".
"All the people who will die starting from this day will also die because of you. Because of your weakness, because of your disunity," a furious Mr Zelensky added.
On Friday, Nato's secretary-general, Jens Stoltenberg, warned that the introduction of a no-fly zone could lead to a "full-fledged war in Europe involving many more countries and causing much more human suffering".
Ukraine's president has attacked Nato leaders in a fiery speech over their refusal to implement a no-fly zone around the country.
In angry comments, he said the argument reflects the "self-hypnosis of those who are weak, under-confident inside" and that Western reservations indicated that "not everyone considers the struggle for freedom to be Europe's number one goal".
"All the people who will die starting from this day will also die because of you. Because of your weakness, because of your disunity," a furious Mr Zelensky added.
On Friday, Nato's secretary-general, Jens Stoltenberg, warned that the introduction of a no-fly zone could lead to a "full-fledged war in Europe involving many more countries and causing much more human suffering".
Protests across Russia see thousands detained
Nearly 4,000 people have been detained at anti-war protests across Russia on Sunday, rights groups and Russian authorities say.
Some 1,700 people were detained in Moscow alone, the RIA news agency reported, citing the interior ministry.
The OVD-Info rights group says detentions took place in 53 cities.
Although protests have become increasingly restricted in recent years, numerous rallies have taken place across Russia since the invasion.
In the last 11 days, more than 10,000 people have been detained at protests, OVD-Info says.
Nearly 4,000 people have been detained at anti-war protests across Russia on Sunday, rights groups and Russian authorities say.
Some 1,700 people were detained in Moscow alone, the RIA news agency reported, citing the interior ministry.
The OVD-Info rights group says detentions took place in 53 cities.
Although protests have become increasingly restricted in recent years, numerous rallies have taken place across Russia since the invasion.
In the last 11 days, more than 10,000 people have been detained at protests, OVD-Info says.
Ukraine: Angry Zelensky vows to punish Russian atrocities
President Volodymyr Zelensky has said everyone who commits atrocities against Ukraine's civilians will be punished.
He said Ukrainians would not forgive or forget, and accused invading Russian troops of deliberate murder.
"There will be no quiet place on Earth for you. Except for the grave," the president said.
Ukrainian officials say Russia is striking civilian targets around the country, including hospitals, nurseries, and schools.
But Russia denies targeting civilians, saying it is carrying out a "special military operation" against Ukrainian "nationalists" and "neo-Nazis".
President Volodymyr Zelensky has said everyone who commits atrocities against Ukraine's civilians will be punished.
He said Ukrainians would not forgive or forget, and accused invading Russian troops of deliberate murder.
"There will be no quiet place on Earth for you. Except for the grave," the president said.
Ukrainian officials say Russia is striking civilian targets around the country, including hospitals, nurseries, and schools.
But Russia denies targeting civilians, saying it is carrying out a "special military operation" against Ukrainian "nationalists" and "neo-Nazis".
War in Ukraine: Russia says it may cut gas supplies if oil ban goes ahead
Russia has said it may close its main gas pipeline to Germany if the West goes ahead with a ban on Russian oil.
Deputy Prime Minister Alexander Novak said a "rejection of Russian oil would lead to catastrophic consequences for the global market", causing prices to more than double to $300 a barrel.
The US has been exploring a potential ban with allies as a way of punishing Russia for its invasion of Ukraine.
But Germany and the Netherlands rejected the plan on Monday.
The EU gets about 40% of its gas and 30% of its oil from Russia, and has no easy substitutes if supplies are disrupted.
Russia has said it may close its main gas pipeline to Germany if the West goes ahead with a ban on Russian oil.
Deputy Prime Minister Alexander Novak said a "rejection of Russian oil would lead to catastrophic consequences for the global market", causing prices to more than double to $300 a barrel.
The US has been exploring a potential ban with allies as a way of punishing Russia for its invasion of Ukraine.
But Germany and the Netherlands rejected the plan on Monday.
The EU gets about 40% of its gas and 30% of its oil from Russia, and has no easy substitutes if supplies are disrupted.
Telegram founder commits to Ukraine user privacy
The billionaire Russian-born co-founder of messaging app Telegram has told Ukrainian users their data is safe.
In a Telegram post, Pavel Durov, who lives in Dubai, wrote: "I stand for our users no matter what. Their right to privacy is sacred - now more than ever."
Telegram was Ukraine's most popular messaging app - the Observer newspaper reported.
But some experts have raised concerns about the security of users' data.
Moxie Marlinspike, who developed the encryption used by rival platforms Signal- which he created - and WhatsApp, tweeted many users thought Telegram was an encrypted app, but it was "by default a cloud database with a plaintext copy of every message everyone has ever sent/received".
Telegram maintains everything stored on its cloud is securely encrypted, however while all of its data is protected only some of its features use end-to-end encryption.
The billionaire Russian-born co-founder of messaging app Telegram has told Ukrainian users their data is safe.
In a Telegram post, Pavel Durov, who lives in Dubai, wrote: "I stand for our users no matter what. Their right to privacy is sacred - now more than ever."
Telegram was Ukraine's most popular messaging app - the Observer newspaper reported.
But some experts have raised concerns about the security of users' data.
Moxie Marlinspike, who developed the encryption used by rival platforms Signal- which he created - and WhatsApp, tweeted many users thought Telegram was an encrypted app, but it was "by default a cloud database with a plaintext copy of every message everyone has ever sent/received".
Telegram maintains everything stored on its cloud is securely encrypted, however while all of its data is protected only some of its features use end-to-end encryption.
Ukraine war: Putin seeks foreign volunteers to fight in Ukraine
Russian President Vladimir Putin has called for foreign volunteers to be able to fight against Ukrainian forces.
Speaking at a Russian security council meeting, he said those who wanted to volunteer to fight with Russia-backed forces should be allowed to.
Russian Defence Minister Sergei Shoigu said there were 16,000 volunteers in the Middle East ready to fight alongside Russia-backed forces.
US officials said these could include Syrians skilled in urban combat.
Russian President Vladimir Putin has called for foreign volunteers to be able to fight against Ukrainian forces.
Speaking at a Russian security council meeting, he said those who wanted to volunteer to fight with Russia-backed forces should be allowed to.
Russian Defence Minister Sergei Shoigu said there were 16,000 volunteers in the Middle East ready to fight alongside Russia-backed forces.
US officials said these could include Syrians skilled in urban combat.
India accidentally fires missile into Pakistan
India says it accidentally fired a missile into Pakistan on Wednesday, blaming the incident on a "technical malfunction" during routine maintenance.
Delhi said it was "deeply regrettable" and expressed relief no one was killed.
Pakistan's military said a "high-speed flying object" had crashed near the eastern city of Mian Channu and its flight path had endangered passenger flights.
Both countries have nuclear weapons.
India says it accidentally fired a missile into Pakistan on Wednesday, blaming the incident on a "technical malfunction" during routine maintenance.
Delhi said it was "deeply regrettable" and expressed relief no one was killed.
Pakistan's military said a "high-speed flying object" had crashed near the eastern city of Mian Channu and its flight path had endangered passenger flights.
Both countries have nuclear weapons.
US to ban Russian diamond and vodka imports
US President Joe Biden has announced a ban on imports of Russian diamonds, seafood and vodka in the latest response to Russia's war in Ukraine.
The US, European Union and other allies also plan to revoke Russia’s status as an equal trade partner, paving the way for further economic punishment.
The moves add to sanctions that have isolated Russia economically since the invasion.
Its currency has collapsed, while global firms rush to exit the country.
Russian President Vladimir Putin has likened Western sanctions on banks and oligarchs to a declaration of war. Moscow has also threatened to nationalise production plants or factories where work has been suspended.
Western allies announced further economic retaliation on Friday.
US President Joe Biden has announced a ban on imports of Russian diamonds, seafood and vodka in the latest response to Russia's war in Ukraine.
The US, European Union and other allies also plan to revoke Russia’s status as an equal trade partner, paving the way for further economic punishment.
The moves add to sanctions that have isolated Russia economically since the invasion.
Its currency has collapsed, while global firms rush to exit the country.
Russian President Vladimir Putin has likened Western sanctions on banks and oligarchs to a declaration of war. Moscow has also threatened to nationalise production plants or factories where work has been suspended.
Western allies announced further economic retaliation on Friday.
Irbil attack: Missiles from Iran hit northern Iraqi city, US says
Several ballistic missiles launched from Iran have struck the northern Iraqi city of Irbil, US officials say.
The missiles damaged buildings near the US consulate complex but no casualties were reported, officials in the Kurdistan Regional Government said.
The US said none of its facilities were hit in the "outrageous attack".
There has been no confirmation of the launch from Iran, but Iranian state media cited sources as saying that "secret Israeli bases" were targeted.
The attack came six days after two senior officers in Iran's Islamic Revolution Guard Corps were killed in a suspected Israeli air strike near the Syrian capital Damascus. The IRGC had vowed to make Israel "pay for this crime".
Several ballistic missiles launched from Iran have struck the northern Iraqi city of Irbil, US officials say.
The missiles damaged buildings near the US consulate complex but no casualties were reported, officials in the Kurdistan Regional Government said.
The US said none of its facilities were hit in the "outrageous attack".
There has been no confirmation of the launch from Iran, but Iranian state media cited sources as saying that "secret Israeli bases" were targeted.
The attack came six days after two senior officers in Iran's Islamic Revolution Guard Corps were killed in a suspected Israeli air strike near the Syrian capital Damascus. The IRGC had vowed to make Israel "pay for this crime".
War in Ukraine: Russian forces accused of abducting second mayor
Ukraine's government has accused the Russian military of abducting another mayor in an area that it has captured.
Yevhen Matveyev was seized in the southern town of Dniprorudne, Ukrainian Foreign Minister Dmytro Kuleba tweeted, accusing Russia of "terror" tactics.
Earlier, Russia installed a new mayor in Melitopol, after allegedly abducting the city's previous incumbent.
Ukraine's president also accused Russia of trying to create "pseudo-republics" to break his country apart.
Ukraine's government has accused the Russian military of abducting another mayor in an area that it has captured.
Yevhen Matveyev was seized in the southern town of Dniprorudne, Ukrainian Foreign Minister Dmytro Kuleba tweeted, accusing Russia of "terror" tactics.
Earlier, Russia installed a new mayor in Melitopol, after allegedly abducting the city's previous incumbent.
Ukraine's president also accused Russia of trying to create "pseudo-republics" to break his country apart.
Ukraine crisis: US warns China against helping Russia
China will face consequences if it helps Russia evade sanctions in its invasion of Ukraine, the US says.
Unnamed US officials reportedly told multiple news outlets that Russia had asked China to provide military assistance after it began the invasion.
The Chinese foreign ministry accused the US of spreading disinformation. Russia denied asking Beijing for military help.
The exchanges came before top US and Chinese officials met in Rome.
US media outlets, citing Washington officials, say that Russia has in recent days asked China specifically for military equipment, including drones.
China will face consequences if it helps Russia evade sanctions in its invasion of Ukraine, the US says.
Unnamed US officials reportedly told multiple news outlets that Russia had asked China to provide military assistance after it began the invasion.
The Chinese foreign ministry accused the US of spreading disinformation. Russia denied asking Beijing for military help.
The exchanges came before top US and Chinese officials met in Rome.
US media outlets, citing Washington officials, say that Russia has in recent days asked China specifically for military equipment, including drones.
Ukraine war: Zelensky urges Russian troops to surrender
Ukrainian President Volodymyr Zelensky has called on Russian soldiers to surrender.
In his nightly TV address, he said Russian forces had suffered worse losses during their invasion of his country than in the Chechnya conflict.
He said they had already begun to understand that they would not achieve anything by war.
"I know that you want to survive," he said, adding that those who surrendered would be treated "as people, decently".
Ukrainian President Volodymyr Zelensky has called on Russian soldiers to surrender.
In his nightly TV address, he said Russian forces had suffered worse losses during their invasion of his country than in the Chechnya conflict.
He said they had already begun to understand that they would not achieve anything by war.
"I know that you want to survive," he said, adding that those who surrendered would be treated "as people, decently".
Ukraine war: Zelensky invokes 9/11 in plea to US Congress
Ukraine's president invoked the horror of the 2001 terror attacks on the US as he pleaded for more military aid in a historic address to the US Congress.
Volodymyr Zelensky said via video link that Ukraine was enduring a 9/11 every day as it battled Russian forces.
He again urged the US and Nato allies to enforce a no-fly zone over Ukraine, saying: "I need to protect the sky."
President Biden is later set to sign off an extra $800m (£612m) in military aid to Ukraine.
He urged the assembled US politicians to remember coming under attack in the past - at Pearl Harbor in 1941 and on 11 September 2001 - saying Ukrainians were experiencing the same thing every day.
Ukraine's president invoked the horror of the 2001 terror attacks on the US as he pleaded for more military aid in a historic address to the US Congress.
Volodymyr Zelensky said via video link that Ukraine was enduring a 9/11 every day as it battled Russian forces.
He again urged the US and Nato allies to enforce a no-fly zone over Ukraine, saying: "I need to protect the sky."
President Biden is later set to sign off an extra $800m (£612m) in military aid to Ukraine.
He urged the assembled US politicians to remember coming under attack in the past - at Pearl Harbor in 1941 and on 11 September 2001 - saying Ukrainians were experiencing the same thing every day.
Why isn't Ukraine a Nato member?
Nato originally offered Ukraine eventual membership back in 2008, and after Russia's annexation of Crimea in 2014, Ukraine made joining Nato a priority.
But this hasn't happened, mainly because of Russia's long-standing opposition to such a move.
Russia fears Nato is encroaching on its territory by taking on new members in eastern Europe, and that admitting Ukraine would bring Nato forces into its backyard.
Ukraine's President Zelensky has now accepted his country cannot join Nato at present, saying: "It is clear that Ukraine is not a member of Nato. We understand this."
The UK Prime Minister Boris Johnson made the same point, saying, "There is no way Ukraine is going to join Nato any time soon".
One of Russia's demands before the invasion was that Ukraine should never be allowed to join - something the alliance had refused to support.
Nato originally offered Ukraine eventual membership back in 2008, and after Russia's annexation of Crimea in 2014, Ukraine made joining Nato a priority.
But this hasn't happened, mainly because of Russia's long-standing opposition to such a move.
Russia fears Nato is encroaching on its territory by taking on new members in eastern Europe, and that admitting Ukraine would bring Nato forces into its backyard.
Ukraine's President Zelensky has now accepted his country cannot join Nato at present, saying: "It is clear that Ukraine is not a member of Nato. We understand this."
The UK Prime Minister Boris Johnson made the same point, saying, "There is no way Ukraine is going to join Nato any time soon".
One of Russia's demands before the invasion was that Ukraine should never be allowed to join - something the alliance had refused to support.
Ukraine conflict: Putin lays out his demands in Turkish phone call
The first four demands are, according to Mr Kalin, not too difficult for Ukraine to meet.
Chief among them is an acceptance by Ukraine that it should be neutral and should not apply to join Nato. Ukraine's President Volodymyr Zelensky has already conceded this.
There are other demands in this category which mostly seem to be face-saving elements for the Russian side.
Ukraine would have to undergo a disarmament process to ensure it wasn't a threat to Russia. There would have to be protection for the Russian language in Ukraine. And there is something called de-Nazification.
The second category is where the difficulty will lie, and in his phone call, Mr Putin said that it would need face-to-face negotiations between him and President Zelensky before agreement could be reached on these points. Mr Zelensky has already said he's prepared to meet the Russian president and negotiate with him one-to-one. read more
The first four demands are, according to Mr Kalin, not too difficult for Ukraine to meet.
Chief among them is an acceptance by Ukraine that it should be neutral and should not apply to join Nato. Ukraine's President Volodymyr Zelensky has already conceded this.
There are other demands in this category which mostly seem to be face-saving elements for the Russian side.
Ukraine would have to undergo a disarmament process to ensure it wasn't a threat to Russia. There would have to be protection for the Russian language in Ukraine. And there is something called de-Nazification.
The second category is where the difficulty will lie, and in his phone call, Mr Putin said that it would need face-to-face negotiations between him and President Zelensky before agreement could be reached on these points. Mr Zelensky has already said he's prepared to meet the Russian president and negotiate with him one-to-one. read more
Australia sues Facebook over scam ads impersonating celebrities
Australia has launched legal action against Facebook's parent company Meta, alleging it allowed scam ads to target users with fake celebrity endorsements.
The tech giant had engaged in "false, misleading or deceptive conduct" by knowingly hosting the ads for bogus cryptocurrencies, a regulator said.
The US company could face financial and other penalties.
Meta is yet to comment but has previously said it is committed to keeping scammers off its platforms.
The Australian Competition and Consumer Commission (ACCC) says the ads in question used Facebook's algorithms to target susceptible users and featured bogus quotes by Australian celebrities. read more
Australia has launched legal action against Facebook's parent company Meta, alleging it allowed scam ads to target users with fake celebrity endorsements.
The tech giant had engaged in "false, misleading or deceptive conduct" by knowingly hosting the ads for bogus cryptocurrencies, a regulator said.
The US company could face financial and other penalties.
Meta is yet to comment but has previously said it is committed to keeping scammers off its platforms.
The Australian Competition and Consumer Commission (ACCC) says the ads in question used Facebook's algorithms to target susceptible users and featured bogus quotes by Australian celebrities. read more
Russians board International Space Station in Ukrainian colours
Russian cosmonauts Denis Matveyev, Oleg Artemyev and Sergey Korsakov docked at the ISS after a three-hour flight which blasted off from a Russian-owned facility in Kazakhstan.
"Congratulations on the successful docking," a voice from Russia's mission control said moments later.
A few hours later, two sets of hatches were opened and the three smiling men floated into the space station one by one wearing bright yellow space suits with blue accents.
The standard-issue Russian uniform is plain blue, and at least one of the men was seen wearing this before take-off. read more
Russian cosmonauts Denis Matveyev, Oleg Artemyev and Sergey Korsakov docked at the ISS after a three-hour flight which blasted off from a Russian-owned facility in Kazakhstan.
"Congratulations on the successful docking," a voice from Russia's mission control said moments later.
A few hours later, two sets of hatches were opened and the three smiling men floated into the space station one by one wearing bright yellow space suits with blue accents.
The standard-issue Russian uniform is plain blue, and at least one of the men was seen wearing this before take-off. read more