An extension of the Yemen truce will be the first test of the credibility of the Saudi-Iran deal, said Alex Vatanka, director of the Iran program at the Middle East Institute.

“One thing is to have a photo-op, and another thing to actually – for Saudi Arabia and Iran, for example – to sit down and end the Yemen war,” he told VOA.

The White House would not confirm reporting by Saudi media that a truce extension in Yemen is imminent

Things would have been different if the Saudis believed that U.S. leadership in creating a military coalition against Iran was serious, said Vatanka, of the Middle East Institute.

"But if they can’t confront Iran alone without the support of the U.S., then why confront Iran at all?” he asked.