Protesters marched through the streets of the capital, Phnom Penh, on Sunday and clashed with police who were armed with tear gas, smoke grenades and water cannons.
Protests in Cambodia

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A protester gestures between flames during clashes with security forces in Phnom Penh, Sept. 15, 2013.

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A protester supporting the opposition Cambodia National Rescue Party throws a stone as another tries to remove barbed wire barricades during clashes with police in Phnom Penh, Sept. 15, 2013.

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Police officers use water cannons during clashes with protesters near the Royal Palace in Phnom Penh, Sept. 15, 2013.

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An injured protester of Cambodia's opposition party is carried to a hospital near the Royal Palace in Phnom Penh, Sept. 15, 2013.