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

The exact cause of the Jeju Air crash remains unclear, and the investigation is complicated because the black boxes stopped recording four minutes before impact.

The feathers and blood stains on both engines of the Jeju Air plane were from the Baikal teal, a type of migratory duck that flies in large flocks, according to a preliminary investigation report published on Monday.

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Pilots’ actions after the bird strike are an early focus of the investigation, according to people familiar with the probe.

Preliminary investigation into the Air Busan Airbus A321 fire at Gimhae has not found evidence of dangerous items brought on board the twinjet, and no immediate indication that the blaze was terrorism-related.

THREE passengers were injured when flames ripped through a South Korean commercial plane today, forcing the evacuation of all 176 people on board. An Air Busan plane burst into flames on the

STORY: South Korea has released the initial findings of a probe into the crash of a Jeju Air flight last month. But mysteries remain. All 175 passengers and four of six crew were killed in the incident,

Bird feathers and bloodstains were found in both engines of the Jeju Air plane that crashed in December, according to a preliminary investigation released Monday.

The first report on last month’s Jeju Air crash in South Korea confirmed bird strikes in the plane's engines, though officials haven't determined

Both engines of the Jeju Air plane that crashed last month contained duck remains, according to a preliminary report.