Hyde Park, 海德公園

A Metropolitan Police officer and two members of the public were knifed and four other PCs were injured after a water fight and party in Hyde Park, central London, spiralled out of control yesterday (Pictured: Police in riot gear face a group of young people at the park)
London police officer stabbed after Hyde Park water fight descends into chaos | Daily Mail Online
Read more: http://www.dailymail.co.uk/news/article-3698316/Police-officer-stabbed-struck-bottle-spontaneous-Hyde-Park-water-fight-descends-blade-chaos-two-revellers-suffering-knife-wounds.html#ixzz4EydraSFZ
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