'Our last hours': Ukrainian commander in Mariupol's Azovstal

STORY: Serhiy Volyna, commander of Ukraine's 36th marine brigade, which is still fighting in Mariupol, urged the international community to help evacuate wounded Ukrainian fighters and their families.

"This is our appeal to the world. It may be our last. We may have only a few days or hours left," he said, dressed in a camouflage jacket. "The enemy units are dozens of times larger than ours, they have dominance in the air, in artillery, in ground troops, in equipment and in tanks."

A Russian ultimatum to Ukrainian troops in Mariupol to surrender or die expired on Wednesday afternoon with no mass capitulation.

Russia denies intentionally targeting civilians. There was no immediate word from Moscow on whether a humanitarian corridor would be established out of Mariupol.

Civilians have been able to escape to other parts of Ukraine only in their own vehicles, while tens of thousands have been bussed to Russia in what Moscow calls humanitarian evacuation and Kyiv calls illegal forced deportation.

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