The overnight attack was one of the largest on Ukraine and included strikes in the western part of the country, which is hit less often.

Russia launched 537 drones and missiles into Ukraine overnight into Sunday morning, according to Ukraine's air force.

Ukraine has for months been using domestically produced long-range drones to strike plants, storage sites and logistical hubs deep inside Russian territory. In May last year, a Ukrainian drone hit an early-warning radar in the Russian city of Orsk, some 1800km from the Ukrainian border, Kyiv officials claimed.