Afghanistan, Oct. 15 -- Small, low-cost fixed-wing suicide drones reportedly powered by commercially available DLE55 engines are emerging as a new challenge for Pakistan's military, with experts warning that the aircraft can be difficult to detect and may force Islamabad to spend heavily on countering relatively inexpensive weapons.

Pakistan said it intercepted 23 suicide drones that entered its airspace from Afghanistan during September. However, the origin of the aircraft, their launch locations and the number that may have reached their intended targets remain unclear, according to a report by France 24.

An examination of photographs and videos of drones intercepted by Pakistani forces suggests that at least some were built using comme...