The gunmen killed four security force members , a medical administrator , and the deputy commissioner of Quetta . Polio workers shot dead on Sunday in northwest Pakistan . The attack took place at a polio vaccination center in the city of Peshawar where gunmen opened fire and killed four workers. Pakistani official thinks `` homegrown terrorists '' may be responsible . Officer dies in bombing of Pakistan founder 's home .
Polio workers shot dead on Sunday in northwest Pakistan . The attack took place at a polio vaccination center in the city of Peshawar where gunmen opened fire and killed four workers. Pakistani official thinks `` homegrown terrorists '' may be responsible . Officer dies in bombing of Pakistan founder 's home .