THIS is the moment a Ukraine naval drone strikes one of Vladimir Putin's key fuel sites sparking chaos in Russia.

The Salavat factory was hit for the second time in less than a week amid Volodymyr Zelensky 's soaring campaign against Russian oil .

Footage shows thick black smoke billowing out of the facility as an inferno rages on the ground.

A second explosion, meanwhile, is seen pounding the building.

Locals reported hearing a "loud noise" before flames ravaged the surrounding area.

The Salavat refinery, considered a linchpin in Russia’s oil industry, was last hit on September 18 - causing a "massive explosion", according to local media.

It's just one of a number of facilities Ukraine has targeted in recent weeks as it steps up its campaign on Russian energy infrastructure.

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