Two water fight events in London, prompted on social media in the midst of a 90-degree heatwave in the U.K., ended in chaos with five people being stabbed, NBC News reported.
London's Metropolitan Police said "our officers came under attack" from bottles and other objects in the capital's Hyde Park after they attempted to negotiate with a group attempting to set up stereo equipment.
The chaos lasted almost four hours — from 8:40 p.m. to 2:20 a.m. local time (3:40 p.m. to 9:20 p.m. ET) — with police using riot shields and horses to push the more than 2,000 people out of the park.
Two 16-year-old boys were also stabbed at another water fight in the city's Burgess Park, police said, where 500 people gathered. Neither suffered life-threatening injuries.
Meanwhile, a British solider died while on a training exercise in the sweltering temperatures.