Two police officers hurt after 'water fight' crowd turns hostile
Two police officers have been injured after a large crowd who gathered for a water fight became violent.
Scotland Yard said one officer was stabbed and another was injured by a bottle when the spontaneous water fight by the Serpentine in London's Hyde Park became hostile at about 8.40pm.
Both officers are being treated in hospital. Their injuries are not life-threatening.
Scotland Yard said two other people who suffered stab wounds are being treated in hospital. Officers awaiting an update on their conditions.
No arrests have been made and police have appealed for witnesses to come forward.