Participants in the Freedom March on Moscow's Lubyanskaya Square. The photo was supplied by the press service of the Moscow Central Administration of the Russian Interior Ministry.

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Police at a "March of Freedom" opposition protest on Lubyanka Square in Moscow.

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Left Front coordinator Sergey Udaltsov, center, during a "March of Freedom" opposition protest on Lubyanka Square in Moscow.

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A participant of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police arrest participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police arrest participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police arrest participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police arrest participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police arrest participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police apprehend participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police apprehend participants of an opposition protest "March of Freedom" on Lubyanka Square in Moscow.

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Police apprehend participants of an opposition protest "March of Freedom" on Lubyanka Square in Moscow.

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Law enforcement personnel at an opposition protest "March of Freedom" on Lubyanka Square in Moscow.

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Law enforcement at an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Participants of an unauthorized "March of Freedom" and journalists on Lubyanka Square in Moscow.

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Police apprehend participants of an unauthorized "March of Freedom" on Lubyanka Square in Moscow.

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Law-enforcement officers detaining participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Law-enforcement officers detaining participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Blogger Alexeio Navalny, left, at the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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A law-enforcement officer and participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Participant in the freedom march on Lubyanskaya Square in Moscow

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Participant in the freedom march on Lubyanskaya Square in Moscow.

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Law-enforcement officers at the freedom march on Lubyanskaya Square in Moscow

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Writer Dmitry Bykov at the unauthorized freedom march on Lubyanskaya Square in Moscow

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Participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Participant of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Taking part in the aunauthorized freedom march on Lubyanskaya Square in Moscow.

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Participants in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Participant in the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Blogger Alexei Navalny (center) at the unauthorized freedom march on Lubyanskaya Square in Moscow.

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Participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Boris Nemtsov, co-chairman of the People's Freedom Party (PARNAS), attends an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Participants of an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Blogger Alexei Navalny attends an unauthorized protest "March of Freedom" on Lubyanka Square in Moscow.

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Police apprehend a Left Front coordinator Sergey Udaltsov during a "March of Freedom" on Lubyanka Square in Moscow.

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Writer Dmitry Bykov at the unauthorized Freedom March on Lubyanka Square, Moscow.

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