Negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program are to return to the secluded sultanate of Oman.

Talks are set to start at expert-level, which will begin drawing up a framework for a potential nuclear deal, ahead of an indirect meeting between the lead negotiators. Trump, in an interview with Time magazine published on Friday,

Representatives from both sides in Oman called the meeting productive and are expected to sit down again for the fourth time, possibly as soon as next week.