The United States and Iran remain divided over the duration of a proposed suspension of Tehran’s nuclear activities following high-level talks in Islamabad, according to a report by The New York Times.

The report said Washington pushed for a 20-year halt to uranium enrichment, while Tehran signalled willingness for a maximum five-year suspension, leaving a key gap between the two sides.

US and Iranian officials discussed multiple proposals during the negotiations, but failed to reach a final agreement due to differences over the timeline. Despite the impasse, both sides have stressed the need to continue dialogue.

The first phase of talks between the delegations was held in Islamabad on April 11, lasting around 21 hours, but ended without a deal.

US Vice President JD Vance said in an interview that there had been positive progress, adding that Washington had presented its proposals and “the ball is now in Iran’s court”.

Tensions persisted in the Strait of Hormuz, where several vessels continued to transit despite a US naval blockade announcement. No immediate reports emerged of ships being intercepted.

Markets reacted positively to expectations of easing tensions, with oil prices declining and stock markets in Asia and Europe posting gains.

Officials said further direct talks between Washington and Tehran are under consideration, though no details have been finalised.

Regional tensions remain high, with reports of Israeli air strikes in Lebanon and casualties across Iran, Lebanon, Israel and Gulf states.

Analysts say resolving differences over Iran’s nuclear programme remains critical for regional stability and global security.