The incident occurred when a speeding bus allegedly ran over one Hari Mandal and police had gone there to take the body and the bus in their custody this morning, SP Ajit Kumar Satyarthi said.
Soon a mob gathered outside the police station and pelted stones in the premises leaving four persons, including two cops, injured, Satyarthi said.
Some protesters later barged into the police station premises and torched the bus, he said.