LANDIKOTAL: The political administration tightened the security in Khyber Agency on Thursday following the killing of a polio worker in an attack the other day in Jamrud tehsil. Political Agent of Khyber Agency Khalid Mehmood told reporters that they had provided foolproof security to the health teams administering polio drops to 0.2 million children in the three tehslils of Khyber Agency. He said each polio team was provided two extra-security personnel. The official said he had assigned political tehsildar of Landikotal, Jamrud and Bara tehsils to personally monitor anti-polio campaign on daily basis. The official said leave of all Khassadar and Levies personnel have been canceled to ensure best possible security to the polio teams.