A tour bus fell on its side after losing control, killing four passengers and injuring about 20 others.
The bus carrying about 50 people departed Suwon City and headed southbound on Gyeongbu Express Way to Mount Daedun in South Chungcheong Province.
The accident occurred at Heodeck Junction at around 9:30 a.m. Sunday.
The number of deaths may increase as eight passengers are said to be seriously injured.
Police and fire authorities are looking into the cause of the accident. The driver reportedly claimed that the bus tried to pass a vehicle that made an abrupt lane change in front of the bus.
Source: KBS World Radio