On Sunday the deadliest air accident ever in South Korea killed 179 people when an airliner belly-landed and skidded off the end of the runway, erupting in a fireball as it slammed into a wall at Muan International Airport.
Two crew members survived and were being treated for injuries.
Investigators are examining bird strikes and weather conditions as possible factors, Lee said. Yonhap news agency cited airport authorities as saying such a strike may have caused the landing gear to malfunction.