Earlier in July, Trump set a 50-day deadline for the Kremlin to reach a truce with Kyiv or risk economic penalties, but the warning has not halted Russia's barrage of strikes. The wave of attacks came as Russia said its troops were pushing deeper into Ukrainian territory.

At least 25 people have been killed across Ukraine in overnight and early morning Russian air strikes that hit a prison and a hospital, claims Ukraine.

A Russian strike on a military training camp killed at least three Ukrainian soldiers on Tuesday, following an overnight offensive in the south that killed a pregnant woman and a dozen prisoners.