Ukrainian officials said Thursday a Russian drone attack killed at least four people in the northeastern city of Sumy. The regional state administration in Sumy said a drone hit a high-rise residential building, and that the attack also injured nine people.

A Russian drone blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack, killing at least four people and injuring nine others, officials said Thursday.

Ukrainian military said Russia launched 81 drones overnight, 37 of which were shot down. At least four people have been killed and nine injured, including a child, in a drone attack on an apartment building in the northeastern Ukrainian city of Sumy.