Members of the Iranian security forces stand guard under a large portrait of Iran's new Supreme Leader, Mojtaba Khamenei, during a memorial to mark the 40th day since his father, Ali Ayatollah Khamenei, was killed in US-Israeli joint strikes.

• Iran and the US could resume ceasefire negotiations soon, US President Donald Trump said.
• The talks are being hosted by Pakistan.
• Iran’s nuclear ambitions are a key sticking point.

Talks to end the Iran war could resume in Pakistan over the next two days, US President Donald Trump said on Tuesday, after the collapse of weekend negotiations prompted Washington to impose a blockade on Iranian ports.

Officials from Pakistan, Iran and the Gulf also said negotiating teams from the US and Iran could return to Pakistan later this week, although one ‌senior Iranian source said no date had been set.

Trump was quoted by the New York Post as saying: “You should stay there, really, because something could be happening over the next two days, and we’re more inclined to go there.”

Later on Tuesday at an event in Georgia, US Vice President JD Vance said Trump wanted to make a “grand bargain” with Iran, but there was a lot of mistrust between the two countries.

“You are not going to solve that problem overnight,” Vance said.

READ | Furious Iran threatens Gulf neighbours as US blocks ports, oil prices dip below $100

While the US blockade drew angry rhetoric from Iran, signs that diplomatic engagement might continue helped to calm oil markets, pushing benchmark prices below $100 per barrel.

Iran has effectively shut the Strait of Hormuz, a crucial global waterway for oil and gas transport, since the war began on 28 February.

Roughly 5 000 people have died in the hostilities.

Talks in Islamabad last weekend did not yield an agreement, raising doubts over the survival of a two-week ceasefire ⁠that still has a week to run.

Iran’s nuclear ambitions were a key sticking point.

The US had proposed a 20-year suspension of all nuclear activity by Iran, while Tehran had suggested a halt of three to five years, according to people familiar with the proposals.

The US has also pressed for any enriched nuclear material to be removed from Iran.

One source involved in the negotiations in Pakistan said backchannel talks since the weekend had produced progress in closing that gap, bringing the two sides closer to a deal that could be put forward at a new round of talks.

It was unclear what kind of nuclear deal could be quickly agreed by the US and Iran, given the complexity of the 2015 nuclear deal between Tehran and world powers that Trump withdrew from in 2018, and the likely need for monitoring and verification by the International Atomic Energy Agency.

Iran also wants international sanctions removed, which the US could not pledge by itself.

US Central Command said no ships made it past its blockade of Iranian ports in the first 24 hours it was in place, while six merchant vessels turned back.

Centcom said more than a dozen US warships were involved in the blockade, which only applies to ships going to or from Iran.

However, shipping data showed the blockade had made little difference to Strait of Hormuz traffic on Tuesday, with at least eight ships crossing the waterway.

The war has clouded the outlook for global energy ‌security and the ⁠supply of goods that rely on petroleum.

The International Monetary Fund cut its growth outlook and said the global economy would teeter on the brink of recession if the conflict worsens, and oil stays above $100 into 2027.

The International Energy Agency, meanwhile, lowered its forecasts for global oil supply and demand growth.

The United States’ NATO allies, including Britain and France, said they would not be drawn into the conflict by taking part in the blockade, although they have offered to help safeguard the strait when an agreement is in place.

China, the main buyer of Iranian oil, said the US blockade was “dangerous and irresponsible” and would only aggravate tensions.

US Treasury Secretary Scott Bessent criticised China for hoarding oil during the war.

Analysts say oil prices are likely to remain elevated for weeks after the strait is fully reopened, due to backlogs, ⁠damaged infrastructure and elevated uncertainty.

Further complicating prospects for peace, Israel has continued to attack Lebanon as it targets Hezbollah, an Iran-backed militant group.

Israel and the US say that the campaign is not covered by the ceasefire, while Iran has insisted it is.

In Washington, US Secretary of State Marco Rubio hosted a meeting between envoys for Israel and Lebanon, which the State Department described as the first major high-level engagement between the two countries since 1993.

Lebanon sought a ceasefire to end Israeli strikes that have killed more than 2 000 people and ⁠forced 1.2 million from their homes, while Israel was pressing for Beirut to disarm Hezbollah.

The US State Department said afterward that the two sides agreed to continue their talks.

Israel’s ambassador to the US said he was hopeful the Lebanese government wanted to reduce Hezbollah’s influence, while Lebanon’s ambassador to the US said in a statement that the meeting was “constructive”, and the date and location of the next meeting would be announced in due course.