US President Donald Trump has threatened to restart the US war with Iran at the same time his vice-president has been meeting with Iranian officials for the first talks under an interim peace deal.

US Vice President JD Vance has postponed crucial talks in Switzerland regarding the US-Iran agreement aimed at ending the Middle East conflict, as Iran's supreme leader expresses…

The announcements indicated a rough start to the technical-level talks that key mediator Pakistan said will begin Sunday, with Qatari mediators also participating.

Lebanon tensions derail progress as Tehran hardens stance in ceasefire negotiations