Police detain protesters and students after they tried to flee outside the Hong Kong Polytechnic University campus in the Hung Hom district of Hong Kong on November 19. A dwindling number of exhausted pro-democracy protesters barricaded inside the Hong Kong university defied warnings on November 19 to surrender, as a police siege of the campus stretched through a third day and China sent fresh signals that its patience with nearly six months of unrest was running out
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