Iran said on Sunday that U.S. airstrikes overnight against three key Iranian nuclear facilities will have “everlasting consequences” as Tehran asserted its right of self-defense against what it called a “grave violation” of international law.

The U.S. bombing of Iran’s Fordo, Natanz and Isfahan nuclear sites was “extremely dangerous, lawless and criminal behavior,” Iranian Foreign Minister Abbas Araghchi said in a post on X early Sunday.

“The events this morning are outrageous and will have everlasting consequences,” he said.

U.S. President Donald Trump said late Saturday that the American bombing of the major nuclear sites was a “very successful attack” and threatened additional assalts if Tehran does not make peace. The targeted Fordo enrichment plant was described by Trump as “completely and totally obliterated.”

The American aistrikes were welcomed by Israeli Prime Minister Benjamin Netanyahu, who lauded Trump’s “bold decision” as a move that “will change history.”

British Prime Minister Keir Starmer, meanwhile, called for deescalation and urged Iran to return to diplomatic negotiations to address the “grave threat” of its nuclear program.

The International Atomic Energy Agency (IAEA) reported no increase in off-site radiation levels following the strikes.