BANNU - Unknown assailants on Wednesday gunned down a supervisor of polio campaign in the Peeple Bazaar area of Bannu, local media reported.

According to police, the deceased was standing by a mobile shop when attackers opened fired on him and fled the scene.

The health worker sustained serious injuries in the incident and succumbed to his wounds while he was being shifted to hospital.

The police have launched investigations into the matter in order to arrest the miscreants.