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 supporting the opposition Cambodia National Rescue Party reacts as police fire tear gas during clashes near the Royal Palace in Phnom Penh. Sept. 15, 2013.

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A supporter of Cambodia's opposition party avoids a smoke grenade near the Royal Palace in Phnom Penh, Sept. 15, 2013