Israel’s massive airstrike attack left Iran’s military leadership in crisis as it killed several senior Iranian commanders — including the head of its Revolutionary Guard.

Iranian security forces raided a drone production workshop operated by Israeli agents in the city of Rey in Tehran province, state media reported early Monday. The raid on the three-story facility south of the capital Tehran uncovered numerous drone parts and explosives, footage broadcast by state television showed.

Israel launched an expanded assault on Iran on Sunday, targeting its energy industry and Defense Ministry headquarters, while Tehran unleashed a deadly barrage of missiles.