The speeding dumper crushed the victim, identified as Deepak Mishra of Adityapur, under the wheels while he was returning home on a two-wheeler tonight, Superintendent of Police, Durga Oraon said.
An irate mob assembled at the spot and put up road blockade before they set afire a dumper and two trucks in protest against the incident, police said.
The mob also damaged windowpanes of vehicles passing through the spot.