The accident occurred around 6.30 am at Kangri bridge crossing, Shyampur area in Haridwar. The SUV being in break-neck speed, the trio was dragged a few metres away by the vehicle. The bodies were sent for postmortem. The SUV driver was arrested and police impounded the vehicle. A case under appropriate sections of IPC was registered against the driver in the police station, Haridwar, it is learnt.