Just after 1.30am this morning (Saturday 5 October), police and emergency services were called to North Terrace, Port Elliot in relation to a blue Ford sedan which had collided with a group of people out the front of licensed premises before leaving the area.

Upon arrival, police identified numerous victims and also had a number of witnesses come forward providing information in relation to the vehicle involved.

A short time later, the driver of the suspect vehicle returned to the scene and was promptly arrested by local patrols. The 37-year-old man has since been taken to the Christies Beach Police station where he is currently being interviewed by detectives and is likely to be charged later today.

The vehicle believed to have been involved in the incident was located nearby on Sturt Street.

A 21-year-old man from Goolwa Beach, a 37-year-old woman from Port Elliott, a 20-year-old woman from Inman Valley and a 30-year-old man from Blackwood were all treated at hospital for minor injuries.

A 22-year-old man from Hindmarsh Island received serious life-threatening injuries and was flown to Adelaide where he remains in hospital.

North Terrace will remain closed for most of the day whilst the scene is examined. Diversions are in place, and members of the public are advised to be patient when driving in the area.

Anyone who witnessed the incident or may have CCTV of the incident is asked to contact Crime Stoppers on 1800 333 000 or submit a tip online at www.crimestopperssa.com.au