United States Army Secretary Dan Driscoll held secret talks on Monday with a Russian delegation in Abu Dhabi in the United Arab Emirates to follow up on this weekend’s talks with Ukraine in Geneva that were intended to move the Ukraine peace process forward, a U.S. official told ABC News.

A barrage of Russian missiles struck Kyiv, Ukraine, overnight, with some areas experiencing disruptions to power and water, local officials said.

At least four people were killed and 17 were injured in Ukraine's northeastern city of Kharkiv in what the local mayor called a "massive" Russian drone attack on Sunday night.

Donald Trump hit out at European and Ukrainian leaders yesterday as they held talks about a US plan to end the war with Russia, amid confusion about Washington’s position.

The counter-proposal would halt fighting at present front lines, leaving discussions of territory for later, and include a NATO-style US security guarantee for Ukraine.