SBU specialists are examining the downed Russian-made drone / Photo from SBU Security Service of Ukraine

"Terrorist groups regularly use drones in that area, violating the Minsk agreements. The intelligence service has repeatedly recorded the escalation of attacks on Ukrainian troops near the village of Hranitne [in Donetsk region's Volnovakha district] after such UAV flights," the press center said.

The downed ZALA 421-04M UAV fell to a minefield, so it took some time to retrieve the drone and deliver it to the SBU's military counterintelligence department for examination.

Read alsoFlightglobal: Israel steps back from fresh UAV deals with RussiaThe device of this type is designed to monitor an area in adverse weather conditions; it may also deliver small freight, the SBU said.

Read alsoHybrid War: Drones attackMilitary counterintelligence specialists are now examining images and footage on the UAV's storage devices.