A Jeju Air flight from Bangkok to Muan crashed while attempting to land at Muan International Airport on Sunday, killing 179 of the 181 people onboard in one of South Korea’s deadliest aviation disasters. The Boeing 737-800 skidded off the runway, hit a barrier and burst into flames. Investigators, who recovered the black box, are examining bird strike warnings issued minutes before the crash and a potential landing gear failure.

Acting President Choi Sang-mok declared Muan a special disaster zone and mobilized over 1,500 emergency responders. The crash, which forced the closure of Muan Airport until Jan. 1, has disrupted travel across South Jeolla Province, a region heavily reliant on the airport for international connections.