BARA: Political authorities arrested dozens of tribesmen supporting Mufti Munir Shakir under the Collective Responsibility Act of the Frontier Crimes Regulation (FCR) on Thursday and sealed their businesses in various parts of the agency. The arrested tribesmen belonged to the Malik Deenkhel and Shalober clans and their businesses in Karkhano Market and Jamrud were closed, official sources said. "More arrests are expected before a formal operation is launched against the cleric's supporters," they said.Khyber Agency was tense on Thursday two days after bloody clashes which left 25 dead and 14 injured when Mufti's supporters attacked supporters of rival cleric Pir Saifullah Rehman.