Authorities have suggested that migratory bird strikes were the cause of last month's deadly plane crash in South Korea, according to multiple reports.

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

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.

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

The investigation into the deadliest air disaster on the country's soil remains ongoing, focusing on the role of bird strike and involving an analysis of the engines and the "localizer" landing guidance structure.

The first report on last month’s Jeju Air crash in South Korea has 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.

South Korean authorities are to carry out an "all-out investigation" into the fatal crash involving a Jeju Air Boeing 737-800, as they release the preliminary report into the 29 December accident.

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Jeju Air Flight 2216's deadliest crash investigation has revealed the presence of bird feathers and blood in the plane engines.According to SCMP, the South Korean officials said on Monday, January 27,

Bird feathers were found in the engines of crashed Jeju Air jet. Investigators claim they have found evidence of a bir