MOSCOW -- A Moscow court has opened the trial of two Russian opposition activists, Sergei Udaltsov and Leonid Razvozzhayev.
The trial started at the Moscow City Court on Tuesday.
Udaltsov, the coordinator of the Left Front movement, and Razvozzhayev are accused of preparing mass riots in Russian regions and organizing an anti-Putin rally on Moscow's Bolotnaya Square in May 2012 that turned violent and left scores of protesters and police injured.
Razvozzhayev is also accused of illegally crossing the border.
Investigators say the protest was orchestrated by a Georgian politician, Givi Targamadze, who is outside Russia.
Udaltsov and Razvozzhayev deny any wrongdoing.