US and Iranian delegations will gather in Rome Saturday for a second round of high-level talks on Tehran’s nuclear program amid tempered optimism about a diplomatic way forward.

Iran and the United States will hold a new round of nuclear talks in Rome on Saturday to resolve their decades-long standoff over Tehran's atomic aims, under the shadow of President Donald Trump's threat to unleash military action if diplomacy fails.

A second round of negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program ended Saturday after several hours of talks, Iranian state television reported. There was no immediate readout on how the talks went at the Omani Embassy in Rome’s Camilluccia neighborhood.