Moscow’s forces are three miles from Dnipropetrovsk, a province they have never invaded. If they cross in, the advance would be a morale blow to Ukraine and complicate any territorial negotiations.

Russia and the United States have had their first meeting since the start of the Ukraine war, aimed at restoring relations and preparing the ground for ending the conflict.

The White House press secretary's remarks gain significance in the backdrop of Donald Trump terming Ukraine president as ‘not very important’ for peace talks.