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.

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.

The drone blew out a wall and surrounding windows in the building in Sumy, a major city, just after 1 a.m., the Sumy regional administration said.