(110215) -- SANAA, Feb. 15, 2011 (Xinhua) -- Anti-government protesters chant slogans during a demonstration as police stand guard in Sanaa, Yemen, Feb. 15, 2011. Hundreds of anti-riot policemen and government backers clashed violently with a thousand anti-government protesters during a demonstration marching towards the presidential palace in Sanaa on Tuesday, leaving a number of protesters injured. (Xinhua/Yin Ke) (zw) | Location: SAANA, Yemen.
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