Southwest Airlines said it will cancel about 70 more flights on Monday to inspect the safety of its aircrafts.
The inspections came after a a five-foot hole ripped in the roof of one of its planes on Friday on a flight from Phoenix to Sacramento, the New York Times reported.
The plane made an emergency landing at a military base in Arizona, the Los Angeles Times reported.
The hole came from small cracks around rivet holes in the aircraft, according to inspectors.
Over the weekend, Southwest cancelled about 600 more flights for inspections and found three more planes with similar cracks.