Ukrainian drones attacked energy facilities in Russia's Astrakhan and Volgograd oblasts overnight on Feb. 3, causing fires, according to local authorities. The news comes as Ukraine ramps up long-range strikes against Russian energy infrastructure to stifle Moscow's gas and oil exports that fuel its war chest.

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

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.