Twenty-one South Koreans were killed Saturday when a bus taking them to a wedding skidded off a bridge and plunged into a mountain valley, police said.
The driver and about 20 passengers were injured in the crash near the eastern town of Inje.
A police spokesman said 17 people died on the spot and four others in hospitals.
The Yonhap news agency said police and soldiers helped with the rescue work after the accident, which occurred in thick fog. Police said a brake failure may have caused the crash.