Russia demands Ukrainian surrender.

MOSCOW -- Russia gave holdout Ukrainian soldiers an ultimatum to lay down arms on Sunday in the pulverised southeastern port of Mariupol which Moscow said its forces nearly completely controlled in what would be its biggest capture of the nearly two-month war.

Several hours after the 0300 GMT deadline, there was no sign of compliance by Ukrainian fighters holed up in the smouldering Azovstal steelworks overlooking the Sea of Azov.

Having failed to overcome Ukrainian resistance in the north...