Washington opposes Tehran’s insistence on retaining the ability to enrich uranium, but U.S. calls latest round “productive.”

Leaders from the United States and Iran painted a positive but cautious picture of talks between the nations over Iran’s nuclear program Saturday, after the third phase of the discussions wrapped up in Oman.

MUSCAT, Oman —Iran and the United States held their first technical-level talks on Tehran’s rapidly advancing nuclear program Saturday, a more complex phase of their high-stakes negotiations.

U.S. President Donald Trump this week said he is open to meeting Iran's supreme leader or president and that he thinks the two countries will strike a new deal on Tehran's disputed nuclear programme.

US President Donald Trump's renewed threat comes as Washington and Tehran continue talks over the Iran's nuclear program, with a third round slated for Saturday in Oman.