It was reported that he was left out at -27 degrees, and then Navajo allegedly drowned with a heart attack.

According to report The Sun The Russian opposition leader in advance had been forced to spend several hours in freezing temperatures of -27 degrees.

The brutal method earlier “was a distinguishing sign of KGB”, according to the founder of the human rights group Gulag, broadcasts Klan Kosova.tv.

Vladimir Putin's biggest opponent died Friday, while holding his 19-year prison sentence on charges of extremism.

Russia has claimed that the lawyer has died “from the unaware death syndrome”. Then there were doubts that his body was found covered with bruise marks and his spokeswoman, Kira Yarmysh, confirmed that “ai was killed”.

Human rights activist Vladimir Orichkin has said of The Times that the signs found on Navlany's body have links to the “a blitz” which in the past has been taught by Russian government agency KGB special operational forces.