A Ukrainian commander in the besieged city of Mariupol has made an urgent plea in a video on his Facebook page, saying that there are over 600 injured civilians and fighters in the Azovstal steel works.

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He added that hundreds of civilians including children are living in unsanitary conditions and running out of food and water.

He issued an urgent appeal for a Dunkirk-style evacuation of troops and civilians from Mariupol.