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 fired a record 479 drones at Ukraine in an overnight aerial barrage, Kyiv's air force said on Monday, the latest massive attack as Moscow rejects calls for a ceasefire.

(Reuters) -Overnight missile and bomb strikes by Russia on the Ukrainian city of Kharkiv left three people dead and 22 hurt, while a Ukrainian drone attack in the Moscow region wounded two people, officials from both countries said separately on Saturday.