Two teenagers have been arrested on suspicion of murder after a man was fatally injured in a Doncaster park.
The 65-year-old was found collapsed in Hexthorpe Park after emergency services were called at about 04:40 BST.
He was taken to hospital but died a short time later, police said.
A 17-year-old boy and an 18-year-old woman have been arrested on suspicion of murder and are being held in police custody for questioning.
South Yorkshire Police said the investigation was in its "very early stages".