President Trump says US Navy will begin blockade of Strait of Hormuz

President Donald Trump said that the U.S. will "immediately" begin a blockade of the Strait of Hormuz, following the failure of peace negotiations between the U.S. and Iran.

"[T]he meeting went well, most points were agreed to, but the only point that really mattered, NUCLEAR, was not," Trump wrote on his social media platform Sunday. "Effective immediately, the United States Navy, the Finest in the World, will begin the process of BLOCKADING any and all ships trying to enter, or leave, the Strait of Hormuz."

The president did not provide specifics in his social media posts. ABC News has reached out to the White House for comment.

Trump's statement comes after Vice President JD Vance, leading a U.S. delegation for high-stakes talks with Iran, said Saturday that the two sides had not reached a deal despite negotiations lasting some 21 hours in Islamabad, Pakistan. Though he declined to provide specifics about why the negotiations deteriorated, Vance said it was in part because the U.S. did not see the "fundamental commitment" from the Iranians not to develop a nuclear weapon in the long term.

Calling Iran's blockage of the Strait of Hormuz "WORLD EXTORTION," the president also said that he had "instructed our Navy to seek and interdict every vessel in International Waters that has paid a toll to Iran. No one who pays an illegal toll will have safe passage on the high seas."

"We will also begin destroying the mines the Iranians laid in the Straits," Trump wrote. "Any Iranian who fires at us, or at peaceful vessels, will be BLOWN TO HELL!"

"The Blockade will begin shortly. Other Countries will be involved with this Blockade. Iran will not be allowed to profit off this Illegal Act of EXTORTION," the president wrote. "They want money and, more importantly, they want Nuclear. Additionally and, at an appropriate moment, we are fully 'LOCKED AND LOADED,' and our Military will finish up the little that is left of Iran!"

Mohammad Bagher Ghalibaf, Iran’s lead negotiator, blamed the U.S. for the failure to reach a deal during the talks in Pakistan, citing what he described as a lack of trust.

Ghalibaf, who serves as Iran’s parliament speaker, said on social media that Iran had put forward "forward-looking initiatives," but the U.S. negotiating team failed to win Tehran’s trust during the 21 hours of negotiations.

He added that Washington now understands Tehran's logic and principles, saying that "it’s time for it to decide whether it can earn our trust or not."

-ABC New’s Rashid Haddou

Pakistan said on Sunday it would seek to continue to facilitate "engagement and dialogue" between the United States and Iran.

"We hope that the two sides continue with the positive spirit to achieve durable peace and prosperity for the entire region and beyond," Ishaq Dar, the foreign minister and deputy prime minister, said in a statement.

"It is imperative that the parties continue to uphold their commitment to ceasefire," Dar added.

The minister's statement described the talks held in Islamabad as "intense and constructive," despite their failure reach an agreement.

-ABC News' Rashid Haddou

Vice President JD Vance, leading a U.S. delegation for high-stakes talks with Iran, said the two sides have not reached a deal despite negotiations lasting some 21 hours in Islamabad, Pakistan.

"The bad news is that we have not reached an agreement," Vance said in brief remarks following the conclusion of the talks. "And I think that's bad news for Iran much more than it's bad news for the United States of America. So we go back to the United States having not come to an agreement."

When asked where the negotiations deteriorated, Vance said he wouldn't get into the full details but that the U.S. needed a firm commitment from Iran that it would not seek a nuclear weapon.

"The simple fact is we need to see an affirmative commitment that they will not seek a nuclear weapon and they will not seek the tools that would enable them to quickly achieve a nuclear weapon," Vance said. "That is the core goal of the President of the United States."

Although Vance said during his remarks that Iran's enrichment facilities have been destroyed, he said the U.S. did not see the "fundamental commitment" from the Iranians not to develop a nuclear weapon in the long term.

"I think that we were quite flexible, we were quite accommodating," Vance told reporters. "The president told us you need to come here in good faith and make your best effort to get a deal."

But he said Iran did not accept U.S. terms.

In addition to Vance, special envoy Steve Witkoff and the president's son-in-law, Jared Kushner, took part in the talks.

Vance said the team communicated with President Donald Trump and other members of the Cabinet throughout the negotiation process.

-ABC News' Hannah Demissie and Emily Chang