Intense fighting continues around the city of Bakhmut in the Donetsk region, which Russian forces have been trying to capture for three months.
Pavlo Kyrylenko, head of Donetsk region military administration, said that Russian forces carried out an airstrike on Bakhmut overnight and hit a high-rise building.
"Three entrances of the building collapsed. Two people may be under the rubble," he said.
Despite the fighting, some civilians have remained in Bakhmut.
Kyrylenko said there had also been shelling in other parts of Donetsk in Siversk, Vuhledar and Avdiivka.
While Ukrainian forces are on the offensive in parts of Donetsk — especially to the east of Sloviansk — Russian shelling and airstrikes continue in other areas in the region.