At least two firefighters were killed battling a blaze that erupted in the southern Saratov region after a Ukrainian drone attacked an oil depot, Russia’s Emergency Situations Ministrysaid Wednesday.

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.

The Ukrainian military says it struck a fuel storage depot deep inside Russia. The strike caused a huge blaze at the facility that supplies an important Russian air base.

A large fire engulfed an oil depot overnight on Jan. 8 in the city of Engels in Saratov Oblast, various Russian Telegram media channels reported.

Ukrainian drones attacked the Russian cities of Saratov and Engels during the night, damaging an industrial facility, according to Roman Busargin, the governor of the Saratov region.

Two firemen were killed on Wednesday during the rescue operation following a drone attack in the city of Engels in Russia's Sara

A state of emergency has been declared in the city of Engels in Russia's Saratov Oblast, where Ukraine's defence forces earlier hit an oil depot that supplies fuel to Russian warplanes. Source: Kremlin-aligned Russian news agency Interfax Quote from Saratov Oblast Governor Roman Busargin: "A state of emergency is to be declared in Engels as the area of fire at the industrial facility targeted in a UAV attack has expanded.

Ukrainian drones reportedly caused a significant fire in Russia's Saratov region, targeting the city of Engels. The area is known for hosting a strategic air base used by Russia's nuclear forces. While videos depicted the fire,

Ukraine's long-range drone strikes on airbases and ammunition depots inside Russia have reduced the glide-bomb threat.