According to L'OEIL du Sahel, a newspaper based in the Far North Region of Cameroon, the first of such drones was spotted and brought down in Borno in Nigeria by the army during the third week of August.
It is believed the drones are meant for information gathering, at least for now.
Several other drones have reportedly been seen by residents of the Lake Chad region.
These unmanned machines are being used by the Al Barnaoui faction of Boko Haram. There are two different factions of the terrorist group now.
The source of the drones is yet unclear. But some people suspect the Islamic State group. Others are of the opinion that Boko Haram is the producer.