Ukraine's capital of Kyiv is under a sustained Russian drone attack, Mayor Vitali Klitschko said early on Tuesday. "The UAV (unmanned aerial vehicle) attack on the capital continues," Klitschko said on his Telegram messaging channel.

KYIV (Reuters) -Russian forces staged their largest ever drone attack on Ukraine overnight, cutting power to much of the western region of Ternopil and damaging residential buildings in Kyiv region, Ukraine's officials said on Tuesday.