A policeman who was providing security to a polio team is killed , police say . Unknown gunmen also kill a polio worker in Khyber Agency , a local official says . - The Pakistani Taliban claim responsibility for the attack on an army hospital and its staff members.
A policeman who was providing security to a polio team is killed , police say . Unknown gunmen also kill a polio worker in Khyber Agency , a local official says . Polio workers have come under increasing attack in Pakistan in the past year .