MOSCOW, March 22 - RAPSI. Russian businessman Sergei Polonsky has appealed to the State Duma to consider setting up a commission to investigate the legality of his imprisonment in Cambodia.

Polonsky writes in his appeal, which he posted on Facebook, that "the numerous attempts to secure my release using legal mechanisms have failed."

"The length of my sentence and my future are unclear to me," he writes. "The Foreign Ministry has not provided any substantial assistance, and every day I learn about attempts or facts of the illegal confiscation of assets from my company, Potok."

The businessman has asked the relevant State Duma committee to analyze the reasons behind the Foreign Ministrys inaction and also to look into the actions of the law enforcement officials who are investigating Potok's complaints about illegal actions taken against the company's property by third parties.

Sergei Polonsky, a real estate developer and once one of Russia's richest men, and two other Russians, Konstantin Baglay and Alexander Karachinsky, were detained on December 30, 2012, for allegedly attacking the six-man crew of a boat which was ferrying them from a Cambodian island to the mainland, threatening the men with a knife and locking them in a cabin.