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

Negotiators from Iran and the United States are set to meet again in Oman on April 26, prompting hopes the two countries might be moving, albeit tentatively, toward a new nuclear accord. The scheduled talks follow the two previous rounds of indirect negotiations that have taken place under the new Trump administration.

The Trump administration is prepared to allow Iran to have a civil nuclear program that relies exclusively on imported nuclear fuel, Secretary of State Marco Rubio said, outlining a possible compromise with Tehran aimed at preventing it from building a nuclear weapon.