"I think no one will be surprised to believe that Putin's hidden hand is behind some of the Iranian tactics and potentially ... some of their capabilities as well," Healey said.

Kuwait authorities urge residents to stay indoors and avoid exposure during potential nuclear or hazardous incidents.

Public advised to seal windows and doors to limit entry of harmful radiation or contaminants.

Citizens instructed to shelter in place, preferably in inner rooms away from windows.

Of all the times world media talked about World War 3 over the past two decades , this is the closest we have been to it.

Estonian authorities say the drone was likely not targeting Estonia, but had apparently gone off course during a Ukrainian strike on Russian infrastructure.