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.

The US and Iran have commenced crucial nuclear deal negotiations in Oman, their third meeting in recent weeks, mediated by Omani Foreign Minister Badr Albusaidi. Discussions, led by US envoy Steve Witkoff and Iranian Foreign Minister Abbas Araghchi,

Iran and the United States held in-depth negotiations in Oman over Tehran's rapidly advancing nuclear program on Saturday, ending the discussions with a promise for more talks and perhaps another high-level meeting next weekend.