Bahrain, Sudan and the UAE have already rallied behind Saudi Arabia against Iran.
Gulf governments are reluctant to give permanent residency to anyone beyond a small pool of citizens.
UN children's agency calls on all parties in conflict to ensure safety of children.
The U.S. backed Saudi airstrikes in Yemen and supported Iranian-backed militias in Iraq as nuclear deadline loomed.
Iranian-allied Houthis besiege Yemeni president's base as Saudi Arabia deploys a reported 150,000 troops and 100 warplanes.
Arab-Gulf oil ministers want media to present policy in a positive way after oil price coverage.
Stock markets across the Middle East fell sharply on Sunday adding to a plunge in Gulf equity markets