"[Early in the morning], an unidentified unmanned vehicle allegedly fell on the territory of the Ilsky oil refinery. As a result of the fall, the apparatus crashed, the infrastructure of the plant was not damaged, and there was no fire. Security services and law enforcement agencies are on the scene," the operational headquarters said in a statement.
There is no threat to the life of residents and no casualties, the authorities said, adding that no property was damaged.
On Tuesday, the Russian Defense Ministry said that Ukraine attacked the Russian capital with eight unmanned aerial vehicles, adding that all drones were shot down.