DUBAI/WASHINGTON (Reuters) – U.S. and Iranian officials said they had reached an agreement to end their war and reopen the Strait of Hormuz, a preliminary pact that sent oil prices falling but leaves the fate of Tehran’s nuclear program to further negotiations.
While still a framework, the deal marked the biggest breakthrough towards resolving the conflict that has killed thousands and upended energy markets since it began with joint U.S.-Israeli strikes on Iran in February.
“The Deal with the Islamic Republic of Iran is now complete,” U.S. President Donald Trump wrote on his Truth Social platform at around 5:30 p.m. in Washington (2130 GMT) on Sunday. His post came shortly after Pakistani Prime Minister Shehbaz Sharif, whose country has served as a mediator, announced a deal had been struck early on Monday local time.
The memorandum of understanding is scheduled to be officially signed on Friday in Switzerland.
The precise terms were not immediately known. Sharif said in a post on X that the pact called for “the immediate and permanent termination of military operations on all fronts, including in Lebanon.”
Lebanon has been a sticking point in negotiations, with Israel and Hezbollah ignoring calls from Trump and others to stop their attacks on each other in recent weeks.
In a statement, the secretariat of Iran’s Supreme National Security Council said war and military operations on all fronts, including Lebanon, would end permanently starting on Monday night.
Israeli Defence Minister Israel Katz said the Israeli military would remain in security zones in Lebanon, Syria and Gaza indefinitely in order to protect the border and Israeli settlements, adding that he and Prime Minister Benjamin Netanyahu had made that clear to Trump and other U.S. officials.
“If Iran attacks Israel due to the events in Lebanon – we will attack it with all our might and clearly demonstrate to it the power gaps,” Katz said.
Iran’s deputy foreign minister, Kazem Gharibabadi, said a more expansive agreement on the wider conflict would be negotiated during a 60-day ceasefire period, including sanctions relief for Iran.
The fate of Iran’s nuclear program, another thorny issue, will also be addressed in those later talks, sources previously told Reuters.
Trump said the Strait of Hormuz, a major shipping route for global oil and gas supplies that Iran has effectively shut down for months, would open on Friday, and that he had ordered the end of the U.S. blockade of Iranian ports.
“Ships of the World, start your engines. Let the oil flow!” Trump wrote.
Oil prices fell on the news. Brent crude futures fell 4% in early trading on Monday while stock markets in Asia jumped.
“The lack of details especially on freedom of shipping is a concern but not one that should constrain markets today,” said Sean Callow, a senior FX analyst at ITC Markets.
EU foreign policy chief Kaja Kallas said the deal announced between the United States and Iran marked a “potential breakthrough” in the war and the EU would now weigh how it can be involved in the next phase.
“From economic leverage to nuclear expertise and longstanding relationships with Gulf partners, the EU stands ready to contribute to a sustainable resolution,” Kallas said in a post on X, before a meeting of foreign affairs ministers from the 27 EU member states in Brussels.
The war has become a political liability at home for Trump and his fellow Republicans in Congress, with public opinion polls showing Americans deeply frustrated by rising gas prices ahead of November’s midterm elections. But Trump has also faced pressure from members of his own party who insist that Iran’s nuclear program must be completely shut down.
Republican Senator Lindsey Graham, a leading Iran hawk, praised the deal but said he would be “watching closely” the coming negotiations on Iran’s nuclear program.
“Under our law, any nuclear deal with Iran will be sent to Congress for review and a vote,” he said. “Congratulations to all in getting us to this point.”
During his first term, Trump withdrew the U.S. from a 2015 multilateral Iran deal, negotiated by Democratic President Barack Obama, that lifted sanctions on Tehran in exchange for limits on its nuclear program, including international inspections.
Iran responded by ramping up its enrichment of uranium, producing more than 400 kg (around 900 pounds) of material at close to bomb-grade purity.
