Police sources told Dawn News that the police mobile van was on routine patrol when an explosive device planted in a motorcycle parked along the roadside detonated with a loud bang, damaging the vehicle.
All police personnel aboard the van escaped unhurt.
The condition of the injured student remains unknown.
Following the explosion, a police contingent rushed to the scene and cordoned off the area. An investigation into the incident has been launched.
Bannu and its adjoining areas have witnessed a series of security-related incidents in recent times, with police and security personnel increasingly being targeted in the region.