Rangiya, Jan 24 (Agencies): Three persons were seriously injured and a cop suspended as police fired at a mob, which turned violent on Monday after a youth was knocked down by a speeding vehicle in Assam's Kamrup (rural) district.

Udhab Medhi, 22, was knocked down by a speeding vehicle killing him on the spot early this morning at Dhuparguri area, said District Superintendent of Police PS Mahanta.

Angry residents of the area set ablaze the vehicle and blocked the road demanding immediate arrest of the driver who managed to escape, he said.

The mob burnt tyres and pelted stones following which the police resorted to lathicharge to disperse them.

As the mob turned more violent, the police opened fire in which three persons were critically injured and several others received minor injuries, Mahanta said.

Kuldip Singh, the Officer-in-Charge of Hajo police station, was suspended with immediate effect following the incident.

The situation has now been brought under control, the DSP said.