South Korea will review safety at six low cost airlines after a Jin Air flight made an emergency return to the Philippines.

The transport ministry said Monday that the safety investigation comes as the ministry is looking into the Jin Air incident.

Jin Air Co. said a Boeing 737-800 jet bound for Busan, South Korea, returned to Cebu, the Philippines, 40 minutes after takeoff on Sunday after one of the plane's doors was found to be leaking air.

The company said its initial investigation found no defect in the jet. No injuries were reported.

Jin Air is an affiliate of Korean Air Lines, South Korea's largest airline.