Gulf states are looking for a US commitment to contain Iran in the aftermath of a nuclear accord as they press for weapons sales that would give them a “qualitative advantage” in their stand-off with the Islamic Republic, according to a senior official from the region.

Gulf leaders are set to meet President Barack Obama at Camp David on May 14 for a summit designed to allay Sunni Arab rulers’ concerns over nuclear negotiations.

The senior Gulf official said Arab states were seeking a memorandum of understanding on regional security. He referred to it as a “containment statement and arrangement” and “something short of a treaty”. […]