I had a piece run in the Guardian, so I removed my initial summary of various eyewitness accounts due to possible copyright issues. You can read that article below.
I also came across a new eyewitness account at a Newsweek blog that is definitely worth checking out.
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At least 20 black men, including students, tourists and the son of a Caribbean diplomat, were arrested in a popular nightclub district of Beijing on Friday, several of the group being severely beaten on suspicion of dealing drugs, witnesses said.