POLICE fired four shots at a stolen lorry during a dramatic car chase from Sha Tin to Sai Kung last night. During the chase a police motorcycle was knocked down by the lorry and dragged for a distance and the front bumper of an Emergency Unit Land Rover was ripped off. No one was injured in the shooting but the windscreen of the lorry was hit twice. Police arrested the 21-year-old driver after the vehicle became caught in traffic. The drama began about 7.30 pm when a lorry driver left his vehicle at Hang On Estate, Ma On Shan, to make a delivery of canned food, leaving the keys in the ignition. When he was a short distance from the van, he saw a man climb in and drive away. He managed to alert a traffic policeman who radioed for assistance before jumping on his motorcycle and giving chase. A second police motorcyclist joined in the chase and the two officers followed the lorry into a dead-end bus terminus. As they got off their machines, the vehicle made a sudden U-turn and sped towards them. The policemen jumped out of the way but the lorry hit one of the motorcycles and dragged it along the road. One of the officers drew his revolver and fired two shots as the lorry sped towards Sai Sha Highway. Police reinforcements were called in and an Emergency Unit Land Rover parked across the highway in an attempt to stop the lorry. Officers took up positions around the vehicle. As the lorry approached, it mounted the curb to avoid the police blockade but clipped the front bumper of the police vehicle, nearly knocking down a plain-clothes officer who had to jump aside to avoid being hit. The officer drew his revolver and fired two shots at the escaping lorry, which was then caught in traffic coming from the other side of the road. Police rushed the lorry and arrested the driver. Initial investigations revealed that the man did not have a driver's licence.