A man has been arrested and bailed after a person was found with serious injuries in Dane Park, Margate, last month.
But police are still seeking witnesses to the incident.
Officers detained a 28-year-old man from Margate on Saturday, August 31 following the assault that is reported to have taken place just before 5.20am that day.
The victim, a man in his 20s, suffered serious head and leg injuries during the incident. He was taken to a London hospital where he remains in a serious but stable condition.
Enquiries were carried out at the scene, including house-to-house calls, speaking with witnesses and reviewing all available CCTV.
The man arrested has been released on police bail until September 24.
Detectives continue to seek witnesses to the assault. Anyone with information or dashcam footage in the area of Dane Park between 2am and 5.30am should call Kent Police on 01843 222289 quoting reference 31-0357.
Alternatively, contact the independent charity Crimestoppers anonymously by calling 0800 555 111 or using the anonymous online form at Crimestoppers-uk.org