Iran and the U.S. held "positive" and "constructive" talks in Oman on Saturday and agreed to reconvene next week, both sides said, a dialogue meant to address Tehran's escalating nuclear programme with President Donald Trump threatening military action if there is no deal.

Iran's foreign minister has arrived in Oman for talks with the United States over Iran's nuclear programme. Abbas Araghchi told Iranian state television his country wanted a "fair agreement" as delegations from both countries prepare for negotiations.