By Hyunjoo Jin Seoul (Reuters) -Investigators found bird feathers and blood in both engines of the Jeju Air jet that crashed in South Korea last month, killing 179 people, a person familiar with the probe told Reuters on Friday.

South Korean authorities said today they will change the concrete barriers used for navigation at some airports across the country after the Jeju Air crash

SEOUL: Investigators probing the Jeju Air crash that killed 179 people last month have found feathers in both engines, according to South Korean media reports,

South Korea's transport ministry said on Wednesday that it would remove the concrete embankment installed at Muan International Airport following last month's Jeju Air crash, its deadliest domestic air disaster.

South Korea will extend runway safety areas and redesign infrastructure after the crash of a Jeju Air Co. flight last month that killed almost everyone on board, sparking criticism that the design of the airport might have exacerbated the accident.

The deadliest plane crash in South Korea's history is triggering a change at the country's airports. The BBC reports the concrete barriers that contain navigation systems at seven airports will be altered in the wake of the crash,