Three members of a family were killed when their car collided with a truck on Bhawanigarh-Patiala road near Balad Kalan village today.They have been identified as Darshan Singh (45), his wife Gurpreet Kaur (40), and son Karan Kheepal (20), residents of Budhlada.The Bhawanigarh police said Karan and his parents were on their way to Budhlada when the mishap occurred. While Karan died on the spot, his mother succumbed to her injuries at the Bhawanigarh government hospital. Darshan Singh died on his way to Rajindra Hospital, Patiala.ASI Kirpal Singh said the truck driver fled the scene and they had impounded his vehicle.A case under Sections 279, 427 and 304-A of the Indian Penal Code has been registered against the truck driver.