A.R.S. § 13-3804: Duty of officers to disperse unlawful assembly

A. Where any number of persons, whether armed or not, are unlawfully or riotously assembled, the sheriff and his deputies, officials governing the city or town, peace officers or justices of the peace and constables, or any of them, shall go among the persons assembled, or as near to them as possible, and command them, in the name of the state, immediately to disperse.

B. If the people assembled do not immediately disperse, the magistrate and officers shall arrest them, and for that purpose may command the aid of all persons present or within the county.