Russia’s defence ministry says it has thwarted a major Ukrainian offensive in Donetsk, claiming to have killed 250 troops and destroyed armoured vehicles.
Video of what Russia says is the battle appears to show military vehicles coming under heavy fire in fields.
But there has been no comment from Kyiv and Russia’s claim has not been independently verified.
A Ukrainian counter-offensive has been long awaited but Kyiv says it will not give advance warning of its start.
It is too early to say whether this alleged offensive is the start of Kyiv’s long-awaited counterpunch.