The attack mostly targeted western regions of the country, the air force said, where much of the military aid provided by Ukraine's Western allies is believed to be delivered and stored.

Russia launched 614 air attack munitions into Ukraine overnight into Thursday, the air force in Kyiv said, in a "massive combined air strike" on targets in the country.

The Ukrainian Air Force says Russia has launched a major aerial attack on Ukraine, firing 574 drones and 40 missiles.