Iran has threatened strikes on recreational and tourist sites worldwide, insisting it continues to build missiles.

The defiant show on Friday came nearly three weeks after U.S.-Israeli attacks killed several of Tehran’s top leaders and severely damaged its weapons and energy infrastructure.

Amid the region observing one of the holiest days on the Muslim calendar, Iran fired on Israel and energy sites in neighboring Gulf Arab states.

Domestically, Iranians marked Nowruz, the Persian New Year, a normally festive holiday muted this year by the ongoing conflict.

Details on the extent of damage to Iran’s military, nuclear, and energy facilities since the war began Feb. 28 remain scarce, and the question of who truly holds power in Tehran is still uncertain.