Russian investigators say there is new evidence proving key opposition leaders were working with foreign backers to help overthrow the government.
Investigative Committee spokesman Vladimir Markin said Friday said the new information confirms that activists Sergey Udaltsov, Leonid Razvozzhayev and Konstantin Lebedev met with officials from Georgia in order to plot mass riots.
Markin also said other opposition activists also traveled to other countries to get training on how to organize the riots.
Russia first filed charges against Udaltsov, Razvozzhayev and Lebedev in October after a pro-Kremlin television station aired a documentary about the alleged meeting with foreign elements.
Udaltsov told the Interfax news agency the new allegations are garbage and said the timing is an attempt to undermine a major opposition protest planned for December.