Ukrainian drones struck deep inside Russia in an overnight attack targeting an oil facility serving a military airfield in the city of Engels, nearly 400 miles from the border, Ukraine’s military said Wednesday.

Russian authorities set up an emergency command centre to fight a fire at the facility near Engels, in the Saratov region.

Ukraine confirmed responsibility for a drone strike against a Russian oil base, which was located near a major military airbase, in the city of Engels. Submit your questions for our correspondents in the box below.

Ukraine attacked a oil depot that supplies a military airfield in the Russian city of Engels. Both countries continue to trade drone strikes as the war approaches its fourth year.

Russia launched 38 Shahed drones into Ukraine. The air defense shot down 28 Russian drones, according to the Ukrainian Air Force. From 7:30 p.m. on January 6 to 9 a.m. Kyiv time on January 7, Russia attacked with 38 Shahed-type attack drones and various types of imitator drones from the directions of Millerovo,

Russia uses its "shadow fleet" to evade sanctions on its energy exports. This murky network of vessels uses deceptive tactics to move around.

A huge fire exploded at the ‘Kristal’ oil complex in the city of Engels after long-range strikes, said Ukraine’s military