A man was left fighting for his life following an early morning confrontation at Hoyland on Sunday morning.
The 49-year old man suffered serious head injuries after approaching a male who is thought to have been breaking in to his car.
The incident took place on Skiers View Road at around 3.15am.
A South Yorkshire police spokesman said: “It is thought the unknown male may have been attempting to break into the 49-year-old man’s car.
“Following the confrontation, the 49-year-old man was left with serious head injuries and was transported to the Royal Hallamshire Hospital in Sheffield.
“His condition is described as life threatening.”
Officers would like to encourage anyone with information about the incident, or who saw any suspicious activity in the area, to contact South Yorkshire Police on 101, quoting incident number 298 of 21 July.”