An underground resistance movement spearheaded by a Russian defector has emerged from the shadows, calling for the violent overthrow of Vladimir Putin.

The group, known as Black Spark, claims it is building a clandestine anti-regime network inside Russia made up of 'middle-class' professionals, business figures, anti-war activists and fighters with combat experience.

Now, its public representative has been revealed as Igor Volobuev, a Kremlin-linked ex-banker who defected to Ukraine after Putin's invasion and took up arms against Russia.

Volobuev said 'shifts' were underway inside Russia and claimed members of Putin's elite had lost faith in the Kremlin leader.

'The people surrounding Putin understand something very simple, figuratively speaking, "Akela has long since missed,"' he said, comparing the 73-year-old despot to the ageing wolf leader from Rudyard Kipling's The Jungle Book.

'Everyone sees it. He cannot hit any target any more.'

Black Spark's manifesto openly calls for armed resistance against the Russian state.

'Putin's terror killed our belief in dialogue,' the group declares.

'We realised that under a dictatorship, justice is forced to stand with Molotov cocktails.'

The movement denounces Russia's invasion of Ukraine as 'our shame and our crime' and argues that simply removing Putin is not enough.

'The empire itself - Russia's greatest curse - must collapse,' the manifesto states.

Despite its tiny social media footprint, fewer than 3,000 Telegram followers and around 1,500 on X, the organisation claims it already has influential members embedded across Russia, including within state-linked energy giant Gazprom.

Volobuev insisted Black Spark was not an FSB trap or factional Kremlin project.

'I was given compelling evidence that this movement was truly powerful,' he said after clandestine meetings abroad with key figures.

'I met people there whom I knew while living in Russia. Some are from the Gazprom system.'

The ex-banker claimed members included engineers, IT specialists, lawyers, entrepreneurs and Russians of Ukrainian heritage who oppose Putin's relentless war.

Some participants had access to 'various offices in Russia, including those in power.'

Black Spark's name itself is tied to sabotage, according to Volobuev.

'They see their main goal as the destruction of the oil industry as Russia's lifeblood,' he said.

Ukraine is known to cooperate with the grouping and is almost daily hitting key oil targets.

Volobuev mocked Putin's recent trip to China, portraying the Russian president as weakened and dependent on Xi Jinping.

'He just flew to Xi Jinping to bow before him because Xi summoned him,' he said, 'They humiliated him there and he came back.'

He singled out the failure to finalise the long-delayed Power of Siberia 2 gas pipeline deal, which Beijing has repeatedly slowed while demanding favourable prices and terms.

Volobuev argued Putin's war machine was exhausting Russia politically, economically and psychologically.

'People are fed up with Putin,' he said, 'He's burning them in the fire of war.'

The former banker highlighted the horror of Putin's cannon fodder assault units, which he has witnessed on the frontline from the Ukrainian side.

Russian assault troops were now effectively sent on 'one-way missions' constantly hunted by swarms of FPV drones and thermal-imaging surveillance.

'Not once has anyone come back,' he claimed, 'A person cannot hide or disappear.'

Volobuev fled Russia in 2022 after resigning from Gazprombank, one of the Kremlin's most important financial institutions.

Born in Ukraine's Sumy region, he later joined Ukrainian territorial defence units and has repeatedly appeared in Russian opposition media attacking Putin's rule.

He has been decorated by Ukraine, winning the prestigious Golden Cross in the name of President Volodymyr Zelensky.

'There is no scenario where Putin simply leaves,' Volobuev said. 'He can only be overthrown by force.'