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.

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.

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