The Russian Prosecutor-General's Office has sent the criminal case against opposition Left Front movement leader Sergei Udaltsov and his alleged accomplice, Leonid Razvozzhayev, to court.
Deputy Prosecutor-General Viktor Grin made the announcement on December 4, saying the case was forwarded to the Moscow City Court.
Udaltsov is accused of preparing mass riots in Russian regions and organizing mass riots in Bolotnaya Square in May 2012.
Razvozzhayev is also accused of organizing mass riots in Moscow's Bolotnaya Square and other regions of Russia and of illegally crossing the border.
Two other men, Konstantin Lebedev and Georgian citizen Givi Targamadze, have also been accused of involvement in the alleged plot.
Lebedev has already been jailed
after confessing to the charges. Targamadze remains outside Russia.
Based on reporting by ITAR-TASS and Interfax