A man died and several were injured in Rajasthan’s Nagaur during protests on Wednesday over the death of a man believed to be a gangster, ANI reported.

Suspected gangster Anand Pal Singh’s family have refused to cremate him until the Central Bureau of Investigation looks into into his death in an apparent police encounter on June 24. His body has been preserved in a freezer for almost three weeks.

The mob attacked a police team on Thursday with stones and set an official vehicle and four buses ablaze, Hindustan Times quoted senior officer NRK Reddy as saying. Three police personnel were critically injured and are undergoing treatment at a Jaipur hospital. A curfew has been imposed in parts of Nagaur and internet services have been suspended in four districts.

Singh’s family claimed he was shot even after he declared he was willing to surrender, while police officials claim he opened fire and injured three policemen during the incident, the English daily reported.

The protesters also uprooted portions of railway tracks in the area prompting officials to divert train traffic. “It was cleared and the agitators were removed from there,” Reddy told The Hindustan Times.

Police said they had used batons and rubber bullets to disperse the mob, while protesters alleged they were fired at. Section 144 has been imposed in at least four districts.

Singh had 37 cases, including six murder cases, registered against him. He was arrested in 2012 for murder in Jaipur. He escaped police custody while being transported from a court to prison in Ajmer in 2015.