MOSCOW, November 6 - RAPSI. Left Front opposition movement leader Sergei Udaltsov has been asked to testify at the Moscow Prosecutor's Office on Friday, he said.
"I was supposed to go to the Moscow Prosecutor's Office due to an investigation of the Left Front movement and any potential connection with extremism today," he wrote on Twitter. "But the interrogation was postponed as the attorney is sick."

Udaltsov added that the interrogation was postponed until 11:00 a.m. Moscow time on Friday.

RIA Novosti has yet to obtain comments from the prosecutors office. Earlier, the media reported that he was called to testify in the criminal case against him on the preparation of mass riots. Udaltsov said on Saturday that he was called to the prosecutors office and asked to bring the movement's constituent and financial documents.

The leftist protest leader stated that one of the reasons for the investigation was the organization of mass riots case initiated against Udaltsov, his aide Konstantin Lebedev, and Leonid Razvozzhayev, aide to oppositionist Duma lawmaker Ilya Ponomaryov, after the TV premiere of the documentary film, "Anatomy of Protest 2." Udaltsov faces four to ten years in prison. The suspects' homes have been searched.

The filmmakers of the documentary shown on NTV, a channel owned by state-run Gazprom, claim the opposition is preparing a coup using funds from abroad. The film shows Udaltsov and his companions allegedly talking with Georgia's then- Parliamentary Defense and Security Committee head Givi Targamadze, who is said to be experienced in planning the "color" revolutions in Georgia and Ukraine, as well as mass riots in Belarus.