Iran spread the growing regional war to the Caucasus with its first drone strike into Azerbaijan, hitting an airport terminal and damaging a nearby school.

A video recorded by someone at Nakhchivan International Airport showed one of the drones exploding on impact, with another video showing smoke rising from the terminal. The strike makes Azerbaijan the 12th country Iran has targeted with drones and missiles since Feb. 28. Azerbaijan’s Foreign Ministry denounced the attack, saying it attacked civilian infrastructure with no military purpose and wounded two civilians.