MOSCOW, September 20 (RAPSI) - Russian Human Rights Commissioner Vladimir Lukin has lodged a supervisory appeal against a court's decision to extend the detention of Vladimir Akimenkov and Yaroslav Belousov, two persons involved in the Moscow riots case, their attorney Dmitry Agranovsky told RAPSI on Friday.

Agranovsky reminded that the European Court of Human Rights (ECHR) has given top priority to the appeal against the lengthy term of detention and inhumane confinement conditions filed by Akimenkov and Belousov.

Meanwhile, the Moscow City Court earlier cancelled the latest extension of Akimenkov's detention and he had to be released on June 10 but the term of his imprisonment was then extended for six months.

The mass protests 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 clashes between protesters and the police.

Over 400 people were arrested and scores were injured when protesters briefly broke through police lines.

The criminal case was initiated after the "Anatomy of Protest 2" documentary film was shown on the 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 Georgian politician 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.