MOSCOW, July 22 (RAPSI) - Russian investigators have conducted searches in Perm, Yekaterinburg and Chelyabinsk in last year's riots case, the Investigative Committee reported on Monday.

"On July 22, 2013, as part of a probe into the [riots] criminal case, investigators in Chelyabinsk, Perm, and Yekaterinburg conducted searches and questioning of participants of a training camp organized during spring and summer 2012 in Russian regions by Sergei Udaltsov, Leonid Razvozzhayev and other people," the Investigative Committee said in a statement Monday.

Seized documents having importance for the case and results of testimony confirm that the main goal of the training camp was to manipulate people to rally, the committee said.

The mass riots took place at a Moscow protest rally on the eve of Vladimir Putin's inauguration for a third presidential term in May 2012 . The rally ended in violent clashes between protesters and the police. Over 400 people were arrested and scores were injured when protesters briefly broke through police lines in a bid to take their protest to the Kremlin walls.

The case was initiated after the "Anatomy of Protest 2" documentary film was shown on Russia's NTV broadcasting network. The film claimed that the opposition was organizing a coup using funds from abroad and showed Left Front movement coordinator Udaltsov and his companions allegedly talking with Givi Targamadze, who at the time headed Georgia's Parliamentary Defense and Security Committee, and is said to have been involved in planning the "color" revolutions in Georgia and Ukraine, as well as the mass riots in Belarus.