TEHRAN PROVINCE, Iran — In a bold move early Sunday, the United States launched strikes on three sites in Iran, joining Israel’s efforts to dismantle the country’s nuclear infrastructure. This action represents a significant step in weakening a long-standing adversary despite concerns about sparking a broader regional conflict.

During a national address from the White House, President Donald Trump declared that Iran’s crucial nuclear facilities had been “completely and fully obliterated.” However, there was no independent verification of the damage.

The future of U.S. involvement alongside its ally Israel, engaged in a nine-day conflict with Iran, remains uncertain. Acting without legislative approval, President Trump cautioned that further strikes would occur if Tehran retaliated against American forces.

“There will either be peace or there will be tragedy for Iran,” he said.

The Atomic Energy Organization of Iran confirmed that attacks took place on its Fordo, Isfahan and Natanz sites, but it insisted that its work will not be stopped. Iran said there were no signs of radioactive contamination at the three locations and no danger to nearby residents.

Iran has maintained that its nuclear program is for peaceful purposes only, and U.S. intelligence agencies have assessed that Tehran is not actively pursuing a bomb. However, Trump and Israeli leaders have claimed that Iran could quickly assemble a nuclear weapon, making it an imminent threat.

The decision to directly involve the U.S. in the war comes after more than a week of strikes by Israel on Iran that aimed to systematically eradicate the country’s air defenses and offensive missile capabilities, while damaging its nuclear enrichment facilities. But U.S. and Israeli officials have said American stealth bombers and the 30,000-pound (13,500-kilogram) bunker-buster bomb they alone can carry offered the best chance of destroying heavily fortified sites connected to the Iranian nuclear program buried deep underground.

“We have completed our very successful attack on the three Nuclear sites in Iran, including Fordow, Natanz, and Esfahan,” Trump said in a post on social media. “All planes are now outside of Iran air space. A full payload of BOMBS was dropped on the primary site, Fordow. All planes are safely on their way home.”

Trump added in a later post: “This is an HISTORIC MOMENT FOR THE UNITED STATES OF AMERICA, ISRAEL, AND THE WORLD. IRAN MUST NOW AGREE TO END THIS WAR. THANK YOU!”

Israeli Prime Minister Benjamin Netanyahu praised Trump’s decision to attack in a video message directed at the American president.

“Your bold decision to target Iran’s nuclear facilities, with the awesome and righteous might of the United States, will change history,” he said. Netanyahu said the U.S. “has done what no other country on earth could do.”

Israel announced Sunday that it would close the country’s airspace to both inbound and outbound flights in the wake of the U.S. attacks.

The White House and Pentagon did not immediately elaborate on the operation. U.S. military leaders are scheduled to provide a briefing at 8 a.m. Eastern.

The attack used bunker-buster bombs on Iran’s Fordo nuclear fuel enrichment plant that is built deep into a mountain, a U.S. official said. The weapons are designed to penetrate the ground before exploding. The official spoke on condition of anonymity to discuss military operations.

In addition, U.S. submarines launched about 30 Tomahawk missiles, according to another U.S. official who also spoke on condition of anonymity.

The strikes are a perilous decision, as Iran has pledged to retaliate if the U.S. joined the Israeli assault, and for Trump personally. He won the White House on the promise of keeping America out of costly foreign conflicts and scoffed at the value of American interventionism.

U.N. Secretary-General Antonio Guterres said he was “gravely alarmed” by the “dangerous escalation” of American strikes.

“There is a growing risk that this conflict could rapidly get out of control — with catastrophic consequences for civilians, the region, and the world,” he said in a statement.

Trump told reporters Friday that he was not interested in sending ground forces into Iran, saying it’s “the last thing you want to do.” He had previously indicated that he would make a final choice over the course of two weeks.

Iran’s Supreme Leader Ayatollah Ali Khamenei warned the United States on Wednesday that strikes targeting the Islamic Republic will “result in irreparable damage for them.” And Iranian Foreign Ministry spokesman Esmail Baghaei declared “any American intervention would be a recipe for an all-out war in the region.”

Trump has vowed that he would not allow Iran to obtain a nuclear weapon, and he had initially hoped that the threat of force would bring the country’s leaders to give up its nuclear program peacefully.

The Israeli military said Saturday it was preparing for the possibility of a lengthy war, while Iran’s foreign minister warned before the U.S. attack that American military involvement “would be very, very dangerous for everyone.”

The prospect of a wider war loomed. Iranian-backed Houthi rebels in Yemen said they would resume attacks on U.S. vessels in the Red Sea if the Trump administration joined Israel’s military campaign. The Houthis paused such attacks in May under a deal with the U.S.

White House press secretary Karoline Leavitt said Thursday that Trump planned to make his decision on the strikes within two weeks. Instead, he struck just two days later.

Trump appears to have made the calculation — at the prodding of Israeli officials and many Republican lawmakers — that Israel’s operation had softened the ground and presented a perhaps unparalleled opportunity to set back Iran’s nuclear program, perhaps permanently.

The Israelis say their offensive has already crippled Iran’s air defenses, allowing them to significantly degrade multiple Iranian nuclear sites.

But to destroy the Fordo nuclear fuel enrichment plant, Israel appealed to Trump for the bunker-busting American bomb known as the GBU-57 Massive Ordnance Penetrator, which uses its weight and sheer kinetic force to reach deeply buried targets and then explode. The bomb is currently delivered only by the B-2 stealth bomber, which is only found in the American arsenal.

It was the first combat use of the weapon.

The bomb carries a conventional warhead, and is believed to be able to penetrate about 200 feet (61 meters) below the surface before exploding, and the bombs can be dropped one after another, effectively drilling deeper and deeper with each successive blast.

The International Atomic Energy Agency has confirmed that Iran is producing highly enriched uranium at Fordo, raising the possibility that nuclear material could be released into the area if the GBU-57 A/B were used to hit the facility.

Previous Israeli strikes at another Iranian nuclear site, Natanz, on a centrifuge site have caused contamination only at the site itself, not the surrounding area, the IAEA has said.

Israeli strikes on Iran have killed at least 865 people and wounded 3,396 others, according to the Washington-based group Human Rights Activists. The group said of those dead, it identified 363 civilians and 215 security force personnel.

Trump’s decision for direct U.S. military intervention comes after his administration made an unsuccessful two-month push — including with high-level, direct negotiations with the Iranians — aimed at persuading Tehran to curb its nuclear program.

For months, Trump said he was dedicated to a diplomatic push to persuade Iran to give up its nuclear ambitions. And he twice — in April and again in late May — persuaded Netanyahu to hold off on military action against Iran and give diplomacy more time.

All the while, Trump has gone from publicly expressing hope that the moment could be a “second chance” for Iran to make a deal to delivering explicit threats on Khamenei and making calls for Tehran’s unconditional surrender.

The military showdown with Iran comes seven years after Trump withdrew the U.S. from the Obama-administration brokered agreement in 2018, calling it the “worst deal ever.”

The 2015 deal, signed by Iran, U.S. and other world powers, created a long-term, comprehensive nuclear agreement that limited Tehran’s enrichment of uranium in exchange for the lifting of economic sanctions.

Trump decried the Obama-era deal for giving Iran too much in return for too little, because the agreement did not cover Iran’s non-nuclear malign behavior.

Trump has bristled at criticism from some of his MAGA faithful who have suggested that further U.S. involvement would be a betrayal to supporters who were drawn to his promise to end U.S. involvement in expensive and endless wars.

Madhani reported from Morristown, N.J. Rising reported from Dubai, United Arab Emirates. Associated Press writers Nasser Karimi in Iran; Mehmet Guzel in Istanbul; Josef Federman in Jerusalem; Samy Magdy in Cairo; Matthew Lee and Josh Boak in Washington; and Farnoush Amiri and Jon Gambrell in Dubai contributed to this report.

Copyright 2025 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.