A polio team was attacked on Sunday, injuring four people including a minor girl.
According to police, the polio team was administering vaccines to children in Pashtoonabad when militants threw a hand-held bomb at them which blasted and injured a five-year-old girl and a lady health worker. Two more persons sustained injuries.
The wounded, including the minor girl were immediately rushed to the hospital.
The attack also led to partial damage of a nearby house.
A polio campaign is under-way in Balochistan for the last four days.