District magistrate Aparna Upadhaya said curfew has been clamped in the Mussouri police station area.
Police sources said the protestors torched a police vehicle and two-three private vehicles. They also blocked national highway and pelted stones on the car of MP Rajender Agarwal
According to police, six policemen were injured in the violence.
Provincial Armed Constabulary personnel were deployed in the trouble-hit areas.
The protesters claimed torn papers from the scripture were found at Adhyatmik Nagar station platform, according to police sources.
