A person with knowledge of the discussions told The Associated Press that the third round of talks between Iran and the United States over Tehran’s rapidly advancing nuclear program have ended.

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

Iran and the United States met in Oman on April 26 for the third round of talks over Tehran’s rapidly advancing nuclear program. A fourth round is scheduled for May 3, also in Oman.