The victims belonged to the same family and were uncle and nephew, police said.
Prasanta Kundu (50) and his nephew Som Kundu (12), residents of Khano village, were on their way to Galsi bazar when they were hit and runover by a sand-laden truck, police said.
The two died on the spot, police said and added that the local people put up a blockade in protest but lifted it after a while.