Officials say a Russian drone has blasted a hole in an apartment building in northeastern Ukraine during a nighttime attack, killing at least four people and injuring nine others.

A Russian drone struck a multi-storey apartment building in the northeastern Ukrainian city of Sumy early on Thursday, killing four people and injuring nine, including a child, the regional authorities said.

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.