Opposition activists on St. Isaac's Square in St. Petersburg.

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City residents play chess during the opposition rally on St. Isaac's Square in St. Petersburg.

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Opposition activists on St. Isaac's Square in St. Petersburg.

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Opposition activists on St. Isaac's Square in St. Petersburg.

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Opposition activists on St. Isaac's Square in St. Petersburg.

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Opposition activists on St. Isaac's Square in St. Petersburg take part in a teleconference with protesters in Moscow..

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Opposition protesters in St. Isaac's Square in St. Petersburg take part in a teleconference with protesters in Moscow.

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Opposition protesters in St. Isaac's Square in St. Petersburg take part in a teleconference with protesters in Moscow.

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Opposition activist on St. Isaac's Square in St. Petersburg.

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Opposition activists on St. Isaac's Square in St. Petersburg.

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Volunteers bring food to opposition activists on St. Isaac's Square in St. Petersburg.

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Volunteers bring food to opposition activists on St. Isaac's Square in St. Petersburg.

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Opposition activist on St. Isaac's Square in St. Petersburg.

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