Detectives are appealing for information following an assault with intent to rob in Newton Mearns in the early hours of Saturday (March 2).
At around 2.20am, a 32-year-old man was in his car, a white Audi, in Hill Avenue, Newton Mearns, when a man opened his passenger door and and attacked him.
The assault caused the driver to hit the accelerator pedal and crash his vehicle into a parked car in front.
The victim then managed to get out his car and run for help.
However, the attacker, along with three other men, pursued him along Hill Avenue where he was assaulted again.
The suspects fled the scene when another motorist stopped to assist the injured man.
Emergency services attended and he was taken to the Queen Elizabeth University Hospital where he received treatment for his injuries.
The suspects are male, white, between 16 and 18 years of age. Three were wearing dark coloured hooded tracksuits and one was wearing a grey hooded top and dark coloured tracksuit trousers.
Police officers have been carrying out door-to-door enquiries and are gathering CCTV images from around the area for any additional information.
Detective Constable Joseph Keith said: “The motive for this attack is unknown and a man has sustained serious injuries.
“I appreciate the incident occurred in the early hours of the morning but it’s possible someone saw or heard something.
“Perhaps someone saw the four men hanging around Hill Avenue and thought nothing of it at the time. However, in light of this crime, any information could prove vital and I would urge people to get in touch with us.”
Anyone with information is asked to call CID officers at the Robbery Unit, Helen Street Police Station via 101, quoting incident number 0487 of Saturday 2 March 2019. Alternatively, please call Crimestoppers on 0800 555 111 where information can be given anonymously.