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.

The third round of talks in three weeks raised hopes for an Iran nuclear accord, which could avert a new Mideast conflict. President Trump said he believed a deal was within reach.

Iran currently enriches uranium to 60%, far above the 3.67% limit imposed by the 2015 deal but still below the 90% threshold required for weapons-grade material.