Police want to speak to anyone living near Millbrook Park who saw an alleged fight between a group of teenagers last Saturday night (6 February).
Officers say it happened by the middle pavilion at around 9:30pm, resulting in two boys getting cuts and bruises.
Two 17-year-old boys were arrested for breach of the peace and common assault and have been bailed pending further enquiries.
Police are particularly keen to speak to people living in private properties overlooking the park who may have any information.
Anyone who can help with police enquiries can call 612612 or Crimestoppers anonymously on 0800 555 111.