The drones, operated by the SBU and the Special Operations Forces, targeted the flare farm, two primary processing units, and two technological units at the Volgograd oil refinery, an SBU source said.

Recent social media videos show Ukrainian forces using drones similar to IEDs. The drones sit next to roads and then strike Russian military vehicles when they pass.

Russian first-person view (FPV) drones that use fiber optic cables instead of radio waves to connect with their controllers, making them impervious to jamming and other forms of electronic warfare. The Magyar Birds Brigade claims it has devised a system using mobile radars to provide early warning for incoming FPV drones several kilometers away.

Russia attacked Ukraine with 71 Shahed drones and other types of drones. Ukrainian air defense forces destroyed 38 of them. Russia launched the drones from the directions of the Russian cities of Kursk,

Drones and missile attacks have repeatedly targeted oil refineries, as well as sites belonging to the military-industrial complex.