South Korean officials plan to conduct safety inspections of all Boeing 737-800 aircraft operated by the country’s airlines, as they struggle to determine what caused a weekend plane crash that killed

Boeing shares were down as much as 6% Monday morning. Authorities in Korea believe a bird strike could have been a factor in the fatal crash.

South Korea's government said on Monday it will extend the shutdown of Muan International Airport by a week to Jan. 14, citing the ongoing investigation into the crash of a Jeju Air jet that killed 179 passengers on board.

Bird feathers have been found in an engine recovered from the site of the deadly Jeju Air flight which crashed-landedand killed 179 people in South Korea, investigators said. The Boeing 737 -800 skidded off a runway at Muan International Airport and hit a concrete fence,

South Korean authorities have extended the closure of a southwestern airport where a Jeju Air plane crashed and killed 179 people onboard, the land ministry said Monday.