Indian Penal Code, 1860
Chapter VIII - Of Offences against the Public Tranquility
IPC Section 152
Assaulting or obstructing public servant when suppressing riot, etc.
Whoever assaults or threatens to assault, or obstructs or attempts to obstruct, any public servant in the discharge of his duty as such public servant, in endeavouring to disperse an unlawful assembly, or to suppress a riot or affray, or uses, or threatens, or attempts to use criminal force to such public servant, shall be punished with imprisonment of either description for a term which may extend to three years, or with fine, or with both.