Mick Mulvaney will be acting White House chief of staff, replacing General John Kelly.

A watchdog will investigate how a seven-year-old girl died after being detained by US Border Patrol.

The army earlier accused the UN children's agency of spying for Islamists in north-eastern Nigeria.

Opal Tometi, who co-founded the movement, says visiting Nigeria as a child changed her life.

Russia's government wants people to have a laugh - as long as it's at its opponents' expense, and not Mr Putin's.

Are you not sure what happened in the UK this week? You're not alone. Here's a handy debrief.

North Korea is trying to develop civilian technologies but can it become an innovation powerhouse?

Clever ways to make ships more efficient, including blowing tiny bubbles under their hulls.

We all like getting Christmas post, but what if you didn't have anyone to send you so much as a card?

A selection of the best news photographs from around the world, taken over the past week.

It's often the case that jihadist attacks are carried out by individuals already identified as a risk.

DR Congo is using e-voting for the first time, but is it a secure system?

Financial markets had seen smooth sailing in recent years. But it looks like that's over.

Yemen's truce deal is fraught with risk, but it brings the country a step to closer to elusive peace.

PM Scott Morrison says Australia will not immediately move its embassy from Tel Aviv.

Politicians must compromise and find a plan that a majority in Parliament can support, minister says.

The challenge from a coalition of 20 US states is now likely to go to the US Supreme Court.

The move has angered the Russian Orthodox Church, which fears its property in Ukraine could be seized.

Craig Levein is "embarrassed" at his side's 5-0 defeat by Livingston and says they made the hosts look like Paris St-Germain.

A tram derails and overturns in the Portuguese capital, but no serious injuries are reported.

Manchester City midfielder Kevin de Bruyne finished last season "exhausted", according to his manager Pep Guardiola.