Senior aides to South Korea's impeached President Yoon Suk Yeol offered to resign en masse on Wednesday, a day after his office expressed regret over acting President Choi Sang-mok's approved of two new judges to a court set to decide Yoon's fate.

CEO Kim Yi-bae says the airline will reduce winter traffic by between 10-15%, but stresses this is not an admission that it was running too many planes.

A South Korean court gave authorities approval on Tuesday to detain impeached President Yoon Suk Yeol in a criminal investigation into his martial law decree, marking the first time that a sitting president of the country has faced arrest.

South Korea's exports grew at a faster pace in December, beating market expectations, and ended the year with a record performance, trade data showed on Wednesday, though risks loom in the year ahead.

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.

A Jeju Air flight drove off the runway in South Korea and collided with a fence, leaving dozens of passengers dead, the Yonhap News Agency reported.

The police are investigating whether President Yoon Suk Yeol tried to lead an insurrection when he declared martial law and plunged the country into crisis.

South Korea’s exports maintained growth momentum in December as demand from China increased while semiconductor sales stayed resilient.

The Jeju Air jetliner was carrying 175 passengers and six crew when it crash-landed at Muan International Airport just after 9 a.m. local time Sunday.

By Joyce Lee SEOUL (Reuters) -South Korea's leadership crisis will play out in the Constitutional Court, which will decide the fates of President Yoon Suk Yeol and Prime Minister Han Duck-soo, both impeached and suspended from power over a short-lived martial law.