A road to the west of the Donetsk region was blocked. Fighting was continuing for the Donetsk airport. The city had no water and no cell telephone communication. It was impossible to begin repair because of continuing shelling, locals said.
Artillery strikes on the city began late on Wednesday. Thundering explosions and shooting were heard in central part of the city overnight.
Later, the militia pressed Ukrainian troops out of the city, but the Kiev-loyal forces continued strikes on residential areas and infrastructure objects north of Donetsk, the inform bureau of the army of the South-East said on Thursday.
The cities of Gorlovka, Makeyevka and Yenakiyevo were also under fire.
Ukrainian troops lost 16 armoured and 28 other vehicles and up to 130 people in dead and wounded overnight, the bureau said.
ITAR-TASS had no confirmation of the information from other independent sources.