Vladimir Putin’s Fiercest Opponent Has ‘Disappeared’ From His Russian Prison Colony

Russian President Vladimir Putin's staunchest critic has vanished from a penal colony.

Navalny's chief of staff Leonid Volkov revealed that the jailed Kremlin critic had been abruptly transferred in a social media statement.

"His lawyer, who came to see him, was held at the gate until 2pm, and then was told that there is no such convict."

Volkov added: "We do not know where Alexei is now and to which colony he is being taken."

"Of course, neither Alexei's attorneys nor his relatives were informed about his transfer in advance," she said.

"There were rumours that he was going to be transferred to the high-security penal colony IK-6 'Melekhovo', but it is impossible to know when (and if) he will actually arrive there."

Yarmysh added that the longer Navalny's whereabouts are unknown, the risk for his safety increases.

"He remains one-on-one with the system that has already tried to kill him, so our main task now is to locate him as soon as possible," she said.

Some in the West have said the military grade nerve agent that was put into his underpants by state security agents, but the Kremlin have furiously denied this.

He was arrested as soon as his plane touched down in Moscow and has been incarcerated ever since.

He was initially imprisoned for two and a half years for violating his parole conditions of a 2014 fraud charge.

Until now, he has been incarcerated at Penal Colony No. 2 in Pokrov, which is 100 kilometres east of Moscow.

Navalny first rose to international prominence for opposing Putin and his government.

The lawyer and anti-corruption activist had a strong social media presence which he used to lash out about the corruption of Russia and the Kremlin.

He has also organised anti-government demonstrations, has run for office in a bid to reform the country, and formed the Anti-Corruption Foundation.