A missile hit an apartment building on Sunday in Kharkiv, Ukraine's second city, and rescue teams were dispatched to the scene, regional governor Oleh Synehubov said.
A Reuters picture from the scene showed a fire ablaze in a residential building.
"According to updated information, one person has died as a result of a strike by a Russian missile on a residential building," Synehubov wrote on Telegram.
There was no immediate indication of how many people were injured. Synehubov, who earlier put the number of injured at three, said casualties were receiving treatment.