Junior engineer Binay Kumar Singh, his brother Udai Kumar Singh and two others -- Navin Kumar Singh and Gopal, a peon of the department, were travelling in the car when the collision took place.
Binay was killed on the spot while the three other injured occupants of the car were taken to the Sadar Hospital. Doctors there referred Navin and Udai to Jamshedpur, the police said.
The police seized the truck but its driver fled.