Vladimir Putin has in recent days hidden his family members in an “underground city” in Siberia, according to a Russian professor.

The luxury hi-tech bunker is located in the Altai Mountains and was designed for protection in the event of nuclear war, said political scientist Valery Solovey, 61.

The claim comes as Russia is pounding Kyiv and Kharkiv with deadly rockets leading to accusations that Putin is committing war crimes in striking innocent civilians with “vacuum bombs”.

The academic has previously alleged Putin has medical problems hidden from the Russian public, and also claimed that the strongman and his defence minister Sergei Shoigu have taken part in bizarre secret shamanic rituals.

“At the weekend, President Putin’s family was evacuated to a special bunker prepared in case of nuclear war,” said the professor in a video.

“This bunker is located in the [mountainous] Altai Republic.

“In fact, it is not a bunker, but a whole underground city, equipped with the latest science and technology.”

He warned: “I hope this means something to you?

“That the President sends his family to this bunker.”

He did not identify Putin’s family members but has previously alleged Olympic Gold-winning rhythmic gymnast Alina Kabaeva, 38, as his secret spouse.

“This is his real family, and Alina is capable of influencing his decisions,” he said last year.

The claimed move of his family to the bunker came with a “failure” of Putin’s strategic plan to conquer Ukraine, said Solovey.

Putin had been hit by “extremely strong, united and very negative reaction of the collective West regarding Russian plans”.

“Putin had planned to declare the complete and indisputable military victory of Russian troops on the evening of Sunday, 27 February – and announce the end, or the near end of the so-called ‘special operation’,” he said.

“As you know, not a single target of Russia’s invasion in Ukraine was reached.”

Solovey, who claims to have insider contacts in the Kremlin, is believed to be referring to a sprawling mountain dacha built ostensibly by energy behemoth Gazprom around a decade ago in the Ongudaysky district of the Altai Republic, a region of Siberia bordering Mongolia, China and Kazakhstan.