Demonstrations continued into January 1987 when 3,000 students defied a government ban and staged a protest in the vicinity of Tiananmen Square in Beijing. This intelligence summary from U.S. Pacific Command notes that 24 "troublemakers" associated with the illegal protest were apparently detained by police for "education and examination."
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Original source: http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB16/documents/index.html#d5