NEW YORK (AP) -- Southwest Airlines says it is cancelling 300 flights on Sunday as the airline continues its inspection of 79 of its Boeing 737 aircraft, in the aftermath of an emergency landing of one of its planes two days earlier.

The move, confirmed by company spokeswoman Whitney Eichinger, follows 300 cancellations by the airline on Saturday.

The aircraft will be inspected over the next several days at five locations, the company says.

No one was seriously injured Friday as the aircraft carrying 118 people rapidly lost cabin pressure and made a harrowing but controlled descent from 34,500 feet, landing safely near Yuma, Ariz., 150 miles southwest of Phoenix. Southwest says it's investigating what caused a hole to open in the top of the aircraft.