Malerkotla resident Jarnail Singh, his son Sukhdev Singh and a relative Inderjit Singh were killed after the vehicle, in which they were travelling, hit a road divider after one of its tyre burst, they said.
The two others injured in the accident were admitted to the Malerkotla civil hospital, police said.
In another road mishap, Sukhvinder Singh, a resident of village Nanaksar Jagera, was run over by a bus here early this police, police said.