NATO fighter jets shot down multiple Russian drones that violated Polish airspace during an attack on neighboring Ukraine early on Wednesday, as the military alliance denounced Moscow for “absolutely dangerous” behavior that ratcheted up tensions to a new level.

Russia says it downed 221 Ukrainian drones launched on its territory overnight, in one of the largest aerial assaults since May. More than half of the drones were intercepted over the Bryansk and Smolensk regions, south-west of Moscow, where Lukoil facilities were reportedly targeted, the defence ministry said.