At least four people were killed in a major Ukrainian drone ​attack on Russian regions, including Moscow, which ‌faced its largest assault in more than a year.

Three people died in the Moscow region and one in ​the Belgorod region, authorities said on Sunday.

Moscow ​regional Governor Andrei Vorobyov said a woman was ⁠killed when a home was hit in ​Khimki, north of the capital, adding that rescuers ​were searching the debris for another person.

Two men were killed in the village of Pogorelki in the Mytishchi district.

​Several residential high-rises and infrastructure facilities were ​damaged, he said.

Air defences destroyed 81 drones headed for Moscow ‌since ⁠midnight, TASS reported, citing Mayor Sergei Sobyanin, making it the largest attack on the capital in over a year.

Sobyanin said 12 people were injured, mostly ​near the ​entrance to ⁠Moscow’s oil refinery, while three houses were damaged.

The “technology” of the refinery ​was not damaged, he added.

Russia’s defence ministry ​said ⁠556 drones had been downed over the country overnight and into the morning.

The country’s largest airport — Moscow’s ⁠Sheremetyevo — ​said drone debris had fallen ​on its territory without causing any damage.