Six people were killed in a vehicle collision in north China's Shanxi Province Saturday, local police said Sunday.

A shuttle bus carrying two people and a mini-bus with six people onboard collided in Wuzhai County, Xinzhou City, at about 6 p.m. Saturday, said Gao Ming, an officer with the Public Security Administration.

The six mini-bus passengers were killed instantly and the two on the shuttle bus were slightly injured, according to the headquarters of the traffic police authority of Shanxi.

Traffic police are questioning the shuttle bus driver about the cause of the accident.