A Spanish F-18 fighter jet on a NATO air-policing mission Sunday shot down a drone that had illegally entered Romanian airspace.

The drone was detected by radar about 24 kilometers north of the eastern city of Galați after entering Romania from Moldova. Having established radar contact, the fighter jet was authorized to shoot it down at 5:01 a.m. Authorities said debris from the destroyed aircraft had fallen in an uninhabited area between two villages.

Martin O'Donnell, spokesperson for NATO operation headquarters, said additional details regarding Sunday’s incident remained under investigation but that the drone "appears to be Russian.”