The U.S. military struck three sites in Iran early Sunday, inserting itself into Israel ’s effort to decapitating the country’s nuclear program in a risky gambit to weaken a longtime foe amid Tehran’s threat of reprisals that could spark a wider regional conflict.

Israel faced a missile attack on Sunday as Iran said it reserved all options to defend itself after unprecedented U.S. strikes that President Donald Trump said had "obliterated" its key nuclear facilities.