MIRANSHAH (AFP) - At least three policemen were killed in Bannu on Friday when a missile exploded as experts were trying to dismantle it, police said. The incident took place in the town of Bannu on the edge of the North Waziristan tribal area. "An unexploded missile went off while it was being defused, killing three policemen and wounding 12 others," police official Saleem Khan told AFP.