Sharjah 24 – AFP: A Russian ultimatum for the last remaining Ukrainian forces in Mariupol to surrender expired on Sunday, with Moscow poised for a major strategic victory in the southeastern port city.

In Kyiv, renewed Russian air strikes hit an armaments factory, despite Moscow shifting its military focus to gaining control of the eastern Donbas region and forging a land corridor to already-annexed Crimea.

"During the night, high-precision, air-launched missiles destroyed an ammunitions factory near the settlement of Brovary, Kyiv region," Russia's defence ministry said, the third such air strike near the capital in as many days.

Ukrainian Deputy Prime Minister Iryna Vereshchuk urged Russian forces to allow evacuations from Mariupol, which Moscow's forces claim to have brought under their control, though Ukrainian fighters remain holed up in the city's fortress-like steelworks.

Moscow on Saturday issued an ultimatum to the fighters, urging them to lay down their arms by 6:00 am Moscow time (0300 GMT) and to evacuate before 13:00 pm.

"Once again, we demand the opening of a humanitarian corridor for the evacuation of civilians, especially women and children, from Mariupol," Vereshchuk wrote.

Russia's defence ministry said that there were up to 400 mercenaries inside the encircled Azovstal steel plant, calling on Ukrainian forces inside to "lay down their arms and surrender in order to save their lives."

Moscow claims Kyiv has ordered fighters of the nationalist Azov battalion to "shoot on the spot" anyone wanting to surrender.

Ukraine President Volodymyr Zelensky said that if Russian forces kill Kyiv's troops remaining to defend the city, then a fledgling negotiation process to end nearly two months of fighting would be ended.