Armed men on a motorcycle have killed three Chinese engineers and their local driver in a remote tribal region of southwestern Pakistan, according to police. The engineers, who were among 14 working at a concrete factory, were shot with their driver on Wednesday on a road in the town of Hub, about 700km southeast of Quetta, the capital of the restive province Baluchistan, Pervez Zahoor, the region's police chief, said.Shortly after the attack, a Baluch nationalist group, the Baluchistan Liberation Army, claimed responsibility for the shooting. The group said it's fighting for the rights of Baluchistan residents, who claim the government is exploiting their land.