At least three security officials were injured in result of blast at Norrer area of Bannu, police spokesperson said. 

The police further stated that vehicle of security agency was target as bomb exploded when the vehicle was on patrolling. 

The bomb was planted in a parked bicycle at side of the road, sources said. 

The injured have been rushed to nearby hospital where they are being treated. The security agencies have cordoned off the whole area as a search operatio nis underway.