Investigators have found bird feathers and blood in both engines of the Jeju Air Boeing jet that crashed in South Korea last month, killing 179 people. The plane, which was en route from Bangkok to Muan, belly-landed and overshot the runway, bursting into flames after hitting an embankment. Only two crew members survived.

Four minutes before the crash, one of the pilots reported a bird strike and declared an emergency. Air traffic control had also warned of "bird activity" in the area shortly before. Investigators confirmed feathers were found on one engine and that video footage showed a bird strike on the engine.

The plane's black boxes stopped recording about four minutes before the crash, hindering the investigation. Experts noted that it's rare for both engines to be affected by a bird strike, though there have been instances of successful landings in similar situations, such as the 2009 "Miracle on the Hudson.”