U.S. Defense Secretary Ash Carter says Saudi King Salman is welcoming the Iran nuclear deal but expressing reservations about how effectively it will be enforced.

Carter met with the king as well as his defense minister Wednesday in the Saudi Red Sea city of Jedda.

Carter told reporters afterward that the king expressed reservations about how well Iranian compliance with the nuclear deal can be verified. And he expressed concern about the mechanism for reinstating international economic sanctions in the event that Iran is found to have violated the deal.

Carter said the U.S. shares those same concerns.

Saudi Arabia sees Iran as its chief regional foe and is worried about growing Iranian influence in Yemen and elsewhere in the Persian Gulf region.