At least nine people were killed and four others injured when a car ploughed into a crowd of pedestrians in central Seoul on Monday, according to police.
The incident occurred around 9:30 pm local time (1:30 pm BST). Yonhap news agency reported that a man believed to be in his 60s was driving the vehicle when it struck pedestrians waiting at a traffic light.
At least four people were transported to hospitals for treatment. Authorities warned that the number of casualties could rise.
Local media reports suggest the car was travelling in the wrong direction before colliding with two other vehicles and then making contact with pedestrians.
The speed limit in South Korean urban areas is typically 50 kilometres per hour (31 mph), according to a recent report by the Organisation for Economic Co-operation and Development.
Police are currently investigating the cause of the accident.