Fifteen people were injured in a bus accident that occurred Thursday evening in Shibing County in southwest China's Guizhou Province, local police said Friday. The accident occurred at 7 p.m., when a bus with 48 people aboard traveling from Yifenggang County collided with a truck in the village of Shankou, Xinhua reported. The bus overturned, injuring 15 people. Three of the injured are in critical condition. All of the injured have been hospitalized. The cause of the accident is being investigated, an official from the provincial public security department said.