Ukraine has ruled out agreeing to a ceasefire with Russia - and said it will not accept any deal with Moscow that involves giving up territory.
It came as Russia intensified its offensive in the eastern Donbas region and as fears grew for the Ukrainian fighters who became prisoners at the end of the brutal three-month siege of Mariupol.
After ending weeks of resistance by the last Ukrainian fighters in the strategic southeastern city of Mariupol, Russia is now waging what appears to be a major new offensive in Luhansk, one of two provinces in Donbas.
Russian-backed separatists already controlled swathes of territory in Luhansk and the neighbouring Donetsk province before the invasion on 24 February, but Moscow wants to seize the last remaining Ukrainian-held territory in Donbas.