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.

Air crash investigators found evidence of a bird strike on a commercial jet that crashed in South Korea, killing 179 people on board. A preliminary report released by authorities Monday stated that both engines on the Jeju Air Boeing 737-800 jet contained duck DNA,

Both engines of Boeing 737-800 jet contained DNA from Baikal teals, a migratory duck that flies to South Korea.

Preliminary report by South Korean authorities said that both Boeing 737-800 engines had DNA traces from Baikal Teals, migratory ducks which winter in large flocks in South Korea.

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

The six-page report released by South Korean authorities a month after the crash said that both engines of the Boeing 737-800 jet contained DNA from Baikal Teals, a type of migratory duck that flies to South Korea for winter in huge flocks.

Duck remains were found in both engines of the Jeju passenger jet that crashed last month, killing 179 people in the worst air disaster in South Korea’s history.