The first round of talks between high-ranking US and Iranian officials in Switzerland ended Monday, mediators said, after a tense opening marked by Tehran's announcement it had again closed the Strait of Hormuz and US President Donald Trump repeating his threats to resume attacks on Iran.

Iran and the United States agreed Monday to set up communications lines to keep the vital Strait of Hormuz open and end fighting in Lebanon, mediators said, after their first…

US and Iranian officials are still expected to meet in Switzerland on Sunday, but Saturday's events point towards a likely major shift in the agenda for the first round of talks.

Qatar is serving as a mediator alongside Pakistan

High-level peace talks between the US and Iran have commenced in Switzerland, led by Vice President JD Vance and Parliament Speaker Mohammad Bagher Ghalibaf. Mediated by Qatar and…