NEW DELHI/DUBAI - Iran and the United States played down hopes for an imminent breakthrough in efforts to end their three-month-old war on Monday, with the top U.S. diplomat saying Washington will either get a good agreement or deal with the country in "another way."

U.S. Secretary of State Marco Rubio told reporters in New Delhi that the U.S. would give diplomacy every chance to succeed before exploring "alternatives", after President Donald Trump said on Sunday he had told his representatives not to rush into any Iran deal.

There was a "pretty solid thing on the table in terms of their ability to open up the strait, get the strait (of Hormuz) open, enter into a very real, significant, time-limited negotiation on the nuclear matter, and hopefully we can pull it off," Rubio said.

Trump said in a post on Truth Social on Monday the deal will either be "great and meaningful, or there will be no deal at all."

Iran's foreign ministry spokesperson Esmaeil Baghaei said in a weekly briefing on Monday that a conclusion had been reached on many topics, but that does not mean that "we're close to signing an agreement".

The potential memorandum of understanding contains 14 points and is focused on ending the war and the U.S. naval blockade of the Strait of Hormuz, in exchange for Iran taking steps to ensure safe transit through the strategic waterway, he said.

At present the talks are not on the nuclear issue, which will be negotiated over a 60-day period if the framework accord is agreed, Baghaei said.

Trump has said his key aim in the war is to prevent Iran from developing a nuclear weapon with its highly enriched uranium. Tehran has consistently denied it has any plans to do so.

A day earlier, Trump wrote on Truth Social that the U.S. blockade on Iranian ships in the Strait of Hormuz would "remain in full force and effect until an agreement is reached, certified, and signed".

STICKING POINTS

Baghaei said the potential accord contained no specific details on management of the strait, through which about a fifth of the world's oil and liquefied gas flows.

Iran will not charge tolls for ships to pass through the strait, Baghaei said. However, he added there would be a cost for services that will be offered, such as navigation and steps to protect the environment, under a protocol to be agreed with Oman, which shares the opposite shore of the waterway.

The strait has been effectively closed since the U.S. and Israel launched strikes on Iran on February 28, with only a trickle of vessels passing through compared with about 125 to 140 daily before the conflict.

Its closure has caused a spike in oil prices and triggered an energy crisis, which has driven up costs of fuel, fertiliser and food.

Oil prices fell more than 4% to two-week lows on Monday, as optimism grew that the U.S. and Iran were moving closer to a peace deal.

The two sides remain at odds on several difficult issues, such as Iran's nuclear ambitions, Israel's war in Lebanon with the Iranian-backed Hezbollah militia and Tehran's demands for the lifting of sanctions and the release of tens of billions of dollars of Iranian oil revenues frozen in foreign banks.

Iran's central bank chief Abdolnaser Hemmati has travelled to Qatar following talks with a Qatari delegation in Tehran regarding Iran's frozen funds, Iranian media reported on Monday.

Iranian sources had told Reuters that in future stages, "feasible formulas" could be found to resolve the dispute over its highly enriched uranium stockpile, including diluting the material under the supervision of the U.N. nuclear watchdog.

TENUOUS CEASEFIRE

Trump, whose approval ratings have been hit by the war's impact on U.S. energy prices, and who has faced congressional efforts to curb his war powers, has repeatedly played up the prospect of a deal to end the conflict started by the U.S. and Israel.

A tenuous ceasefire has held since early April.

The president hit back at critics of his handling of the negotiations and his willingness to compromise with Iran.

"If I make a deal with Iran, it will be a good and proper one ... So don't listen to the losers, who are critical about something they know nothing about," Trump posted on Sunday.

The U.S.-Israeli bombing of Iran killed thousands of people in Iran before it was suspended in early April.

Israel has also killed thousands more and driven hundreds of thousands from their homes in Lebanon, which it invaded in pursuit of militant group Hezbollah. Iranian strikes on Israel and neighbouring Gulf states have killed dozens.

(Reporting by Reuters bureaux; Additional reporting by Akanksha Khushi, Doina Chiacu, Ariba Shahid, Hatem Mater, Andrew Mills, Elwely Elwelly, Michael Martina and Parisa Hafezi; Writing by Helen Coster, Stephen Coates and Sharon Singleton; Editing by Clarence Fernandez and Aidan Lewis)

A man walks past a banner with a picture of Iran's late Supreme Leader Ayatollah Ali Khamenei, in Tehran, Iran, May 25, 2026. Majid Asgaripour/WANA (West Asia News Agency) via REUTERS Majid Asgaripour Reuters

United States Secretary of State Marco Rubio speaks to the journalists before boarding his plane at Indira Gandhi International Airport in New Delhi, India, Monday, May 25, 2026. Julia Demaree Nikhinson/Pool via REUTERS Julia Demaree Nikhinson Reuters

Vessels in the Strait of Hormuz are visible near the beach of Bandar Abbas, Iran, May 22, 2026. Majid Asgaripour/WANA (West Asia News Agency) via REUTERS Majid-Asgaripour Reuters

A man holds an Iranian flag near an anti-U.S. billboard depicting U.S. President Donald Trump and the Strait of Hormuz, in Tehran, Iran, May 2, 2026. Majid Asgaripour/WANA (West Asia News Agency) via REUTERS Majid Asgaripour Reuters

Copyright Reuters or USA Today Network via Reuters Connect.

This story was originally published May 25, 2026 at 7:11 AM.

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