Trump says damage to Iran's nuclear sites is 'far below ground level'

Defense Secretary Pete Hegseth is briefing reporters on the U.S. strike on Iran, dubbed Operation Midnight Hammer, declaring that “we’ve devastated the Iranian nuclear program” and that Iran’s nuclear program has been “obliterated.”

Hegseth called the military strike “bold and brilliant.”

“When this president speaks, the world should listen,” he said.

Saudi Arabia, Qatar, Iraq and Oman all expressed concern over the U.S. airstrikes on Iranian nuclear sites on Saturday.

Saudi Arabia's Foreign Ministry published a statement noting its "great concern" and expressing the need "to exert all efforts to exercise restraint, de-escalate and avoid escalation" in such "highly sensitive circumstances."

Qatar's Foreign Ministry warned "that the current dangerous tension in the region could lead to catastrophic consequences at both the regional and international levels," while noting its "grave concern" and stressing "the urgent need to halt all military operations and to immediately return to dialogue and diplomatic channels to resolve outstanding issues."

Oman -- which has in the past served as a mediator in talks between Washington and Tehran -- described the American strikes as "illegal aggression" and a "serious violation of international law" in a Foreign Ministry statement posted to X.

Iraqi Foreign Minister Fuad Hussein, meanwhile, said there was a "grave risk posed by attacks targeting religious leaders or nuclear facilities" in Iran, per a readout published on the Foreign Ministry's website.

"Such actions could spark widespread chaos and destabilize the entire region," the readout said, adding that "any strike on Iran's nuclear facilities could lead to a humanitarian and environmental disaster."

Iranian Foreign Minister Abbas Araghchi told reporters in Istanbul, Turkey, on Sunday that President Donald Trump "deceived his own voters" by launching attacks on Iranian nuclear sites, suggesting the president was reneging on his election promise not to get involved in "forever wars."

Araghchi described the American strikes on the Fordow, Natanz and Isfahan sites late Saturday as "outrageous" and laid blame for any fallout on the U.S.

"Washington is solely and fully responsible for the dangerous consequences and far reaching implications of its act of aggression," he said.

Araghchi appeared to close the door on fresh negotiations, saying the path door to diplomacy should always be open but "this is not the case right now."

"It was not Iran, but the U.S. who betrayed diplomacy," Araghchi said. "They betrayed negotiations."

-ABC News' Victoria Beaule

There was no formal "Gang of Eight" briefing for the top leaders of the House and the Senate before the U.S. launched strikes on Iran on Saturday, sources told ABC News, but top Republican members were given details ahead of the action.

Both House Speaker Mike Johnson and Senate Majority Leader John Thune were briefed on the military action before the strikes were carried out, according to people familiar with those conversations.

Democratic leaders -- House Minority Leader Hakeem Jeffries and Senate Minority Leader Chuck Schumer -- were notified of the strike but not given any details, per sources.

One of those sources believed the Democratic leaders were informed only after the military action was underway.

Schumer's spokesperson later told reporters the message came "shortly ahead" of President Donald Trump's announcement, describing it as "a perfunctory notification without any details."

-ABC News' Rachel Scott, Lauren Peller and Allison Pecorin