Washington. US President Donald Trump's administration on Sunday signaled a willingness to renew talks with Iran and avoid a prolonged war in the aftermath of a surprise attack on three of the country’s nuclear sites as US officials assessed Tehran's nuclear ambitions and the threat of retaliation against American interests.

The coordinated messaging by his vice president, Pentagon chief, top military adviser, and secretary of state suggested a confidence that any fallout would be manageable and that Iran’s lack of military capabilities would ultimately force it back to the bargaining table.

Defense Secretary Pete Hegseth said at a news conference that America “does not seek war” with Iran, while Vice President JD Vance said the strikes have given Tehran the possibility of returning to negotiate with Washington.

“This mission was not and has not been about regime change,” Hegseth said.

President Donald Trump, who had addressed the nation from the White House on Saturday night, returned to social media on Sunday to criticize Rep. Thomas Massie, R-Ky., who had objected to the president taking military action without specific congressional approval.

“We had a spectacular military success yesterday, taking the ‘bomb’ right out of their hands (and they would use it if they could!),” Trump said as part of the post on Truth Social.

At their joint Pentagon briefing, Hegseth and Air Force Gen. Dan Caine, chairman of the Joint Chiefs of Staff, said that “Operation Midnight Hammer" involved decoys and deception, and met with no Iranian resistance.

Caine indicated that the goal of the operation -- destroying nuclear sites in Fordo, Natanz, and Isfahan -- had been achieved.

“Final battle damage will take some time, but initial battle damage assessments indicate that all three sites sustained extremely severe damage and destruction,” Caine said.

Vance said in a television interview that while he would not discuss “sensitive intelligence about what we’ve seen on the ground,” he felt “very confident that we’ve substantially delayed their development of a nuclear weapon.”

Pressed further, he told NBC's “Meet the Press” that “I think that we have really pushed their program back by a very long time. I think that it’s going to be many many years before the Iranians are able to develop a nuclear weapon.”

The vice president said the United States had “negotiated aggressively” with Iran to try to find a peaceful settlement and that Trump made his decision after assessing the Iranians were not acting “in good faith.”

"I actually think it provides an opportunity to reset this relationship, reset these negotiations, and get us in a place where Iran can decide not to be a threat to its neighbors, not to a threat to the United States, and if they’re willing to do that, the United States is all ears,” Vance said.

Secretary of State Marco Rubio said on CBS's “Face the Nation” that "there are no planned military operations right now against Iran, unless they mess around and they attack" US interests.

Trump has previously threatened other countries, but often backed down or failed to follow through, given his promises to his coalition of voters not to entangle the United States in an extended war. It was not immediately clear whether Iran saw the avoidance of a wider conflict as in its best interests.

Much of the world is absorbing the consequences of the strikes and the risk that they could lead to more fighting across the Middle East after the US inserted itself into the war between Israel and Iran. Israeli airstrikes that began on June 13 local time targeted Iran's nuclear facilities and generals, prompting retaliation from Iran and creating a series of events that contributed to the US attack.

While US officials urged for caution and stressed that only nuclear sites were targeted by Washington, Iran criticized the actions as a violation of its sovereignty and international law.

Iran’s foreign minister, Abbas Araghchi, said Washington was “fully responsible” for whatever actions Tehran may take in response.

“They crossed a very big red line by attacking nuclear facilities," he said at a news conference in Turkey. “I don’t know how much room is left for diplomacy.”

China and Russia, where Araghchi was heading for talks with President Vladimir Putin, condemned the US military action. The attacks were “a gross violation of international law,” said Russia's Foreign Ministry, which also advocated “returning the situation to a political and diplomatic course.” A Turkish Foreign Ministry statement warned about the risk of the conflict spreading to “a global level.”

British Prime Minister Keir Starmer said the United Kingdom was moving military equipment into the area to protect its interests, people, and allies, but that he was focused on finding a solution. The leaders of Italy, Canada, Germany, and France agreed on the need “a rapid resumption of negotiations.” France’s Emmanuel Macron held talks with the Saudi crown prince and the sultan of Oman.

Iran could try to stop oil exports through the Strait of Hormuz, which could create the same kind of inflationary shocks that the world felt after Russia invaded Ukraine in 2022. Oil prices have increased in the financial markets as the war between Israel and Iran has intensified, climbing by 21 percent over the past month.

The Pentagon briefing did not provide any new details about Iran's nuclear capabilities. Hegseth said the timeline for the strikes was the result of a schedule set by Trump for talks with Iran about its nuclear ambitions.

“Iran found out" that when Trump "says 60 days that he seeks peace and negotiation, he means 60 days of peace and negotiation," Hegseth said. "Otherwise, that nuclear program, that new nuclear capability will not exist. He meant it.”

That statement was complicated as the White House had suggested last Thursday that Trump could take as much as two weeks to determine whether to strike Iran or continue to pursue negotiations. But the US benefited from Iran's weakened air defenses as it was able to conduct the attacks without resistance from Iran.

“Iran’s fighters did not fly, and it appears that Iran’s surface-to-air missile systems did not see us throughout the mission," Caine said.

Hegseth said that a choice to move a number of B-2 bombers from their base in Missouri earlier Saturday was meant to be a decoy to throw off Iranians. Caine added that the US used other methods of deception as well, deploying fighters to protect the B-2 bombers that dropped a total of 14 bunker-buster bombs on Iran’s sites at Fordo and Natanz.

The strikes occurred Saturday between 6:40 p.m. and 7:05 p.m. in Washington, or roughly 2:10 a.m. on Sunday in Iran.