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.

Iran and the United States have agreed to continue nuclear talks next week, both sides said on Saturday, though Iranian Foreign Minister Abbas Araqchi voiced "extreme cautious" about the success of the negotiations to resolve a decades-long standoff.

Iran sees its missile programme rather than its uranium enrichment as a bigger obstacle in nuclear talks with the United States that resume on Saturday, an Iranian official with knowledge of the talks said on Friday.