Kharkiv was a key Russian objective in the early phase of the war when it was still hoping to capture and hold major Ukrainian cities.
Around 2,000 Ukrainian fighters are defending the steel plant in Mariupol which is the city's last pocket or resistance.
Hundreds of people are still stranded inside the plant that's being attacked by Russian forces.
Video posted online Sunday by Ukrainian forces showed elderly women and mothers with small children climbing over a steep pile of rubble from the sprawling...
