"The Saratov Oil Refinery is one of the key facilities in Russia's fuel infrastructure. Its refining capacity reaches 7 million tons of oil annually," Andrii Kovalenko, head of Ukraine's Center for Countering Disinformation,

A Ukrainian drone attack overnight sparked a fire at an oil depot in Russia's southern region of Krasnodar that has since been extinguished, regional officials said on Wednesday.

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.

Ukraine has launched its second major drone attack in a week against Russian oil refineries hundreds of miles from its borders.

Ukrainian natural gas production facilities were damaged in a Russian attack on Ukraine's central Poltava region overnight, the state-run oil and gas firm Naftogaz and Energy Minister German Galushchenko said on Tuesday.

Ukrainians conducted another successful attack on Russian fuel infrastructure. On Tuesday morning, drones attacked a refinery in Saratov. A series of explosions were also heard near an airbase close to the city of Engels.

KYIV (Reuters) -Overnight Russian drone attacks sparked a fire in Kyiv and injured a woman and damaged several houses in the northeastern city of Sumy, Ukrainian officials said on Monday. The Ukrainian military said on Monday that it had shot down 61 out of 83 drones with 22 more likely downed by electronic warfare.

As a result of the attack, Ukraine imposed emergency power restrictions on Tuesday, according to Ukraine energy minister German Galushchenko. "The enemy launched an attack on gas infrastructure overnight,