Russia has bombarded Ukraine with the largest attack of the conflict, launching 479 drones overnight in a bold offensive, the Ukrainian air force said.

Ukraine said its drones hit a Russian research and production facility that supplies components for missiles, as Russia unleashed a fresh barrage of air attacks overnight.

Russia has launched a total of 499 drones and missiles at Ukraine overnight on Monday, specifically targeting western regions of Ukraine. Kyiv has neutralised most of the incoming targets, including Kinzhal ballistic missiles.