The deal includes a commitment to reach a final agreement within 60 days, as well as an end to hostilities on "all fronts" - including in Lebanon - and the reopening of the Strait of Hormuz. But ongoing clashes between Israel and the Iran-backed Hezbollah in Lebanon prompted Iran to announce it had shut the vital shipping route on Saturday - though tracking data shows vessels have continued to pass through it. Vice-President JD Vance said the US hoped for progress on "the nuclear issue" and Lebanon, while Tehran said it would be "demanding that the other side fulfil its commitments".

Vance was joined at the Bürgenstock mountaintop resort by US President Donald Trump's son-in-law Jared Kushner and special envoy Steve Witkoff. For the Iranians, parliamentary speaker Mohammad Bagher Ghalibaf and Foreign Minister Abbas Araghchi arrived in Switzerland late on Saturday. The delegations were joined by Pakistan's Prime Minister Shehbaz Sharif and the head of the country's armed forces, Field Marshal Asim Munir. Pakistan has acted as a mediator throughout the war, and hosted a previous round of negotiations between the US and Iran. (BBC)