The South Waziristan political administration arrested 13 people from the sub-tribe of the Battani tribe to track down killers of former senator Malik Faridullah Khan, tribal areas security chief Arbab Arif told Daily Times on Tuesday. The official said the political administration also demanded the handover of the accused from the Battani sub-tribe since Khan was assassinated in their area," the security official said. The administration also sealed business centres of the sub-tribe in Tank city and impounded several vehicles while raids were being conducted to arrest more members of the tribe.A unnamed tribal source told Daily Times that the arrests would help the government little to find out the perpetrators of the crime since "they are no ordinary men" to have made the successful assassination attempt on Khan. "The government knows my tribe was not involved but it is arresting our people to complete paperwork," he added. The authorities made the arrests in Frontier Region Tank near South Waziristan tribal region on Tuesday under the territorial responsibility clause of the Frontier Crimes Regulations. Under the law, a whole tribe is held accountable for any crime in their areas and given collective punishment as well.