Russian opposition activist Sergei Udaltsov may face up to 10 years behind bars on a charge of “organizing mass disorder”.

      The charges came just over a week after state-run NTV channel aired so-called secretly-filmed footage of Udaltsov meeting Georgian politician Givi Targamadze to discuss plans to seize power in cities across Russia. An Investigative Committee says no evidence the video materials had been doctored was found.

      “I believe there are no grounds at all on which to bring charges against him,”  Udaltsov's lawyer, Violetta Volkova, told RIA Novosti.

      Udaltsov's assistant, Konstantin Lebedev, and an assistant to Just Russia lawmaker Ilya Ponomaryov, Leonid Razvozzhayev, were also charged, the Investigation Committee said on its website.