Hundreds of Turkish riot-clad police have entered Istanbul's Taksim Square on Tuesday, firing tear gas at a small number of anti-government protesters.
Turkish Police Enter Taksim Square

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A protester taunts riot police in Taksim Square in Istanbul, June 11, 2013.

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A protester walks in front of a burning barricade during clashes in Taksim Square in Istanbul, June 11, 2013.

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A protester runs to avoid tear gas as police take cover next to a water cannon in Taksim Square in Istanbul, June 11, 2013.

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Protesters carry another protester affected by tear gas during clashes in Taksim Square in Istanbul, June 11, 2013.