The preliminary report was released by the Aviation and Railway Accident Investigation Board on Monday in South Korea.

Investigators found bird blood and feathers in both engines of the Jeju Air Boeing 737 that crashed in Seoul, killing 179 people.

By Jack Kim and Lisa Barrington SEOUL (Reuters) -Both engines of the Jeju Air plane that crashed last month contained duck remains, according to a preliminary report on Monday, with authorities still trying to determine what caused the deadliest air disaster on South Korean soil.

South Korea's authorities investigating last month's Jeju Air plane crash have submitted a preliminary accident report to the U.N. aviation agency and to the authorities of the United States, France and Thailand,

South Korean officials are launching an investigation into the cause of the fire that engulfed an Air Busan passenger plane, with eyewitness accounts suggesting a power bank may have sparked the blaze.

Black box silence adds mystery to the Jeju Air crash killing 179. A report reveals a bird strike just before the deadly accident.

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The first report on last month's Jeju Air crash in South Korea confirmed traces of bird strikes in the plane's engines, though officials haven't determined the cause of the accident that killed all but two of the 181 people on board.

SEOUL: Investigators have found evidence of a bird strike in the crash of a Jeju Air passenger plane in South Korea in December, which resulted in 179 fatalities.Feathers and blood stains discover

South Korean authorities will increase their scrutiny of the country's low-cost airline sector, including tightening the criteria for MRO workers and enforcing stricter rules on network expansion.

Jeju Air’s leadership in the nation’s budget carrier industry is being threatened by the upcoming convergence of Jin Air and the possible merger of T’way Air and Air Premia, according to data and industry officials,

The fire broke out in the back of the cabin, officials said. All 176 people on board, including passengers and crew members, were evacuated, some with minor injuries.