US police are hunting a gunman after six people were shot dead in the Michigan town of Kalamazoo. Four people were killed at a restaurant and two at a car dealership, local media say. Three others are injured. It appears that the gunman has been driving around the area targeting people at random. The attacks are being linked to an earlier shooting at a parking lot, which left one woman seriously injured. Police are reportedly looking for white man in his fifties who is believed to be driving a blue Chevrolet HHR.