The United States has drummed up support from Arab allies to help destroy militant group Islamic State (ISIL).
After talks in Saudi Arabia, US Secretary of State John Kerry won backing from Egypt, Iraq, Jordan, Lebanon and six Gulf states including Saudi and Qatar.
Saudi Arabia supports some Sunni groups in Syria, but considers ISIL a terrorist group.
The Saudis have also promised to provide training camps for moderate Syrian Sunni fighters.
The coalition is a big step in building support in the region for US President Barack Obama’s plan to strike both sides of the Syria-Iraq border, a frontier not recognised by ISIL.
The US Central Intelligence Agency (CIA) reports the Sunni militant group has between 20,000 and 31,500 fighters.