Fifteen persons including an Additional District Magistrate (ADM), an Additional Superintendent of Police (ASP) and several others sustained injuries, Deputy Commissioner,Chamba, Sudesh Mokhta said.
Communal tension had gripped Tissa following the rape of a school girl.
Following the incident some locals attacked some teachers which led to further tension. Three persons had earlier been arrested in connection with the attack on teachers.
Mokhta said that ASP Virender Thakur, who was seriously injured, was referred to the Pt Jawaharlal Nehru government medical college hospital, Chamba.