Two men have been injured after a fight broke out at a Worcestershire beauty spot.
Police believe some 40 youths were involved in the disorder at Arrow Valley Country Park in Redditch. The two men, aged 19 and 20, were treated in hospital for minor facial injuries.
A male in his mid-teens was arrested in connection with the incident and later released without charge.
PC Liam Bennett, from Redditch Police, said: "We are trying to establish exactly what happened and are appealing for any witnesses who have not yet spoken to the police to get in touch with us as soon as possible.
"The area was especially busy at the time because of the fair near the Countryside Centre and we'd urge anyone with information about how the incident started or who was involved to give us a call."
Anyone with information on the incident, which happened around 9.30pm on Saturday, can call police on 0300 333 3000 or Crimestoppers anonymously on 0800 555 111.