Ukraine's air force said it recorded 110 Russian attack drones launched into the country overnight into Monday morning. Massed Russian drone barrages have become a nightly occurrence in recent months as winter approaches and Moscow targets Ukraine's energy grid -- as it did in the two previous winters of its full-scale invasion of the country.

Ukrainian authorities said at least 23 people were injured and 41 buildings damaged by a Russian missile strike in the northeastern city of Kharkiv.