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

The United States and Iran on Saturday began "indirect" negotiations on a new nuclear deal in the Gulf Arab nation of Oman and plan to meet again in seven days.

The U.S. and Iran held rare face-to-face nuclear talks in Oman Saturday. The Trump administration is pushing for diplomacy backed by military pressure.