Policeman Stabbed And Four Others Injured As �Water Fight� Turns Violent

A police officer was stabbed and four other PCs were injured after a water fight in central London spiralled out of control in the city's worst bout of violence since the 2011 riots. 

At least three members of the public were also injured last night, with reports indicating at least one was stabbed in the chest, as police tried to disperse a huge water fight in Hyde Park during which rioters chanted 'Black Lives Matter'.