The talks in the coastal city of Jeddah come as the White House considers Iran's latest proposal to end the two-month-old conflict and reopen the Strait of Hormuz.

The crucial waterway saw roughly 20 percent of global crude and liquefied natural gas pass through its waters before the war largely choked off maritime traffic.

Leaders and officials from across the Gulf region were greeted by Saudi Crown Prince Mohammed bin Salman as they arrived in Jeddah, according to images released by Saudi state media.

"During the summit, a number of topics and issues related to regional and international developments were discussed, as well as the coordination of efforts in response to them," the Saudi Press Agency reported.

A source close to the government told AFP that "the current political and security situation in the region" was being discussed during the summit.

Qatari Emir Sheikh Tamim bin Hamad Al Thani later said in a message posted on social media that the gathering "embodied the unified Gulf position toward the current situation and what it requires in terms of intensified coordination and consultation".

Iran launched waves of missiles and drones targeting the Gulf states in response to US and Israeli strikes on the Islamic republic that began on February 28, badly damaging major energy installations across the region.