Police repel protesters with tear gas, pepper spray and water cannon after tens of thousands, opposed to a China extradition bill, advance on the government building.

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Protesters run after police fired tear gas outside the government headquarters in Hong Kong.PHILIP FONG/AFP/Getty Images

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Protesters are engulfed in tear gas near the Legislative Council in Hong Kong.LAM YIK FEI/NY Times

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Demonstrators form a human chain outside the Legislative Council in Hong Kong.LAM YIK FEI/The New York Times

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Police officers fire a tear gas.ATHIT PERAWONGMETHA/Reuters

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A protester is tackled by riot police outside the Legislative Council in Hong Kong.Kin Cheung/AP

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A demonstrator is pinned down by police near the Legislative Council.Kin Cheung/AP

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A policeman reacts to a thrown umbrella.Kin Cheung/AP

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A protester gestures after clashes with riot police.Kin Cheung/AP

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Cars block a road near the Legislative Council building during protests.LAM YIK FEI/The New York Times

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A protester is carried on a stretcher by paramedics during the demonstration.THOMAS PETER/Reuters

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A protester has water poured on his face after police fired tear gas.ANTHONY WALLACE/AFP/Getty Images

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Protesters face off with police during a rally against a controversial extradition law.DALE DE LA REY/AFP/Getty Images

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