Police in South Korea have raided the airport of Muan following a deadly plane crash on site that killed almost all passengers aboard the aircraft last weekend, the Yonhap news agency reported Monday.

Authorities also raided the regional aviation office in Muan, part of Busan’s aviation administration. Read also: Black box data recovered in South Korea’s deadliest plane crash; another sent to U.S.

South Korean investigators said Saturday they were close to finalising the transcript of the cockpit voice recorder from a fatal plane crash that left 179 people dead last week.

The deadliest accident in aviation history occurred in 1977, when two Boeing 747 jumbo jets collided on a foggy runway on the Spanish island of Tenerife, killing 583 of the 644 people on board the planes. Spanish investigators blamed the captain of the KLM 747 for taking off without clearance from air traffic controllers.

South Korea was set Friday to move the tail section of the Jeju Air plane that crashed last week, killing 179 people in the worst aviation disaster on its soil, officials said.The investigation is headed by South Korean air safety officials,

A jetliner skidded off a runway, slammed into a concrete fence and burst into flames Sunday in South Korea after its landing gear apparently failed to deploy.