A roadside bomb hit a vehicle carrying officers assigned to protect health workers conducting a polio immunization drive in a former stronghold of the Pakistani Taliban in northwestern Pakistan on Monday,

The bombing in the South Waziristan district near the border with Afghanistan targeted a convoy carrying polio workers and their guards on the opening day of a nationwide immunization campaign

A roadside bomb struck a vehicle protecting polio immunisation workers in South Waziristan, Pakistan, injuring six officers and three civilians. No polio workers were harmed in the attack.

Officials say a roadside bomb has hit a vehicle carrying officers assigned to protect health workers conducting a polio immunization drive in a former stronghold of the Pakistani Taliban in northwestern Pakistan,