South Korea's transport minister said on Tuesday he intends to step down to take responsibility for the deadly crash of a Boeing jet operated by Jeju Air on Dec. 29.

SEOUL, South Korea (AP) — A team of U.S. investigators including representatives from Boeing have examined the site of a plane crash that killed 179 people in South Korea while authorities were conducting safety inspections on all Boeing 737-800 aircraft operated by the country’s airlines.

Jeju Air’s flight 2216 crash landed at South Korea’s Muan International Airport on Dec. 29 killing 179 of the Boeing plane’s 181 passengers

South Korean officials are struggling to determine what caused a deadly plane crash that killed nearly 180 people on board, with the nation saddened, shocked and ashamed over the country’s worst aviation disaster in decades.

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.

Shares of Boeing fell in early trading on Monday, one day after a Boeing model 737-800 was involved in the Jeju Air plane crash in South Korea that killed scores of passengers. The slide came hours after South Korea's transportation ministry announced it would investigate the crash and conduct a full inspection of all Boeing 737-800 aircraft in use in South Korea.

South Korea plans to review the concrete walls positioned just beyond the end of some airport runways after an aircraft attempting an emergency landing smashed into one just over a week ago, killing almost everyone on board.

After overcoming pariah status at the end of the last century, South Korea must learn what caused the catastrophe on Dec. 29 and what lessons to draw from it.

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.