http://www.bbc.co.uk/news/uk-england-london-36877839
Seriously over a water fight?Seven teenagers have been arrested in connection with a night of widespread disorder near Hyde Park in London.
Four girls - one aged 15, two aged 16 and one 17 - are being questioned over disorder at a McDonald's in Marble Arch on Tuesday.
Two boys aged 16 and 17 and an 18-year-old man were also arrested and have been bailed until September.
The Met has released a further eight images of people they want to speak to.
Thousands of people gathered for a water fight in Hyde Park which descended into violence and spilled out near to shops on Oxford Street.
Three people, including a police officer, were stabbed. A second officer suffered injuries from a flying bottle.
Anyone with information about those pictured should contact the force or Crimestoppers.