Two persons were killed when their motorcycle was knocked down by a speeding truck near the airport in the early hours on Monday, a police official said. Shubham Rathore (18) and Vishal Singh (15) were going on their motorcycle when the truck hit them around 3.30 am. The duo died on the spot, Aerodrome Police Station in-charge Kl Dangi said. The truck driver fled from the spot leaving the vehicle behind. A case has been registered by the police and search is on to nab the absconding truck driver, he said. Vishal's father is a constable in the Army and presently posted in Jammu and Kashmir, Dangi added.