Air assaults on Saturday killed at least four people. Kharkiv’s mayor described an overnight strike as “the most powerful attack” since the beginning of the war.

One of the bombs hit the Children's Railway, a popular gathering place for families in central Kharkiv, Governor Oleh Syniehubov said.

Ukraine says that a large Russian drone-and-missile attack has targeted the eastern city of Kharkiv, killing at least three people and injuring 21.