Five people have died and four injured in a traffic accident on a highway in southwest China's Yunnan Province, Xinhua quoted local authorities as saying today. The accident took place about 1 p.m. Monday in Yao'an County when a mini-bus carrying nine people veered off the highway into a ditch. Four injured people are being treated at a local hospital and are in stable condition, a county government spokesman said. Local police are investigating the cause of the accident, he said.