The third round of talks in three weeks have 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 and the United States have agreed to continue nuclear talks next week, both sides said on Saturday, though Iranian Foreign Minister Abbas Araqchi voiced "extreme cautious" about the success of the negotiations to resolve a decades-long standoff.

The United States and Iran have begun a third round of nuclear talks, entering what experts describe as a more difficult phase of technical negotiations this weekend as Washington lays out its conditions.