A teenager was arrested on suspicion of causing grievous bodily harm after a man was injured in an attack in Cheltenham.
Police were called to Sandford Park at 10pm last Friday, clinic 1 May after reports of a fight between about 10 people.
Arriving at the scene, officers found a 30-year-old man with facial injuries. He was taken by ambulance to Gloucestershire Royal Hospital for treatment.
A 19-year-old man was arrested and bailed to return to a police station on 25 June. A 16-year-old girl was also taken to Cheltenham police station for questioning.
Anyone who witnessed the altercation is asked to call 101, quoting incident 474 of 1 May 2015.