Airlines diverted more flights in the Middle East on Monday after Iran's attack on a U.S. military base in Qatar. Airspace was closed in Qatar and reportedly shut in Bahrain and the United Arab Emirates.

Some U.S. and other international airlines are keeping a halt on flights to major Middle Eastern airports as global carriers scramble to figure out whether to continue flying to the region amid intensifying conflict between Israel and Iran and military intervention by the U.

Singapore Airlines customers who booked their flights directly can use the airline’s Assistance Request Form to seek a refund.