Afghanistan, July 22 -- Militants in Pakistan's northwest increasingly use drones to attack security forces, Pakistani officials report, raising serious concerns about regional security and counterterrorism efforts.

Militants in Pakistan's northwest have begun using commercially acquired quadcopter drones to drop bombs on security forces, police officials said, marking a concerning escalation in the region's ongoing conflict. These drones, which take off and land vertically using four rotors, pose a new challenge to the already overstretched and under-equipped police force, which is the frontline defense against militant attacks.

Police officer Muhammad Anwar reported that two such drones targeted a police station in Bannu district earlie...