OMON, riot police officers detaining banned National-Bolshevik Party leader Eduard Limonov, left, and another participant, no name given, during an unsanctioned protest against Prime Minister Vladimir Putin at Triumfalnaya (Triumph) Square in downtown Moscow, Russia, Sunday, May 31, 2009. Russian Police detained prominent Kremlin critic Limonov and several other people who tried to hold the protest on Sunday. City authorities had refused to grant opposition groups permission for the demonstration, but Limonov's group and others said they would go ahead with it anyway.