STORY: Local authorities initially said Russia had fired a rocket but the police force later said an Iskander-K tactical missile had struck at 9.45 pm local time (1945 GMT).
"At least eight apartment buildings were damaged. One of them was completely destroyed," police said in a Facebook post. "People may remain under the rubble."
At least 44 people were killed last month when a Russian missile hit an apartment building in the eastern city of Dnipro.