Police are investigating an assault that occurred in the wooded area by Whitehaven football club on Sunday 11th October at around 6pm.
The victims are a group of teenage boys and a teenage girl, and the offenders are believed to be a group of teenage boys.
A Cumbria Police spokesman said: “A 15-year-old boy from Whitehaven has been arrested on suspicion of assault and released under investigation.”
Anyone with information or who witnessed the incident is asked to contact PC 2635 Jefferson on 101 or Crimestoppers anonymously on 0800 555 111.