At least three people have been killed and another 17 injured in the biggest Russian drone attack on Ukraine's Kharkiv, the city's mayor says.

A large Russian drone-and-missile attack has targeted Ukraine’s eastern city of Kharkiv, killing at least three people and injuring 21.

Russia attacked the eastern Ukrainian city of Kharkiv at night with drones, missiles and guided bombs, killing at least three people and injuring 22, including a one-and-a-half-month-old baby, the city mayor,