The Forensic Crash Unit is investigating a single-vehicle traffic crash at Pimpama earlier this morning.
Initial investigations indicate just before 1am, a Holden Commodore was travelling west along William Boulevard when it mounted a roundabout before colliding with a retaining wall.
A 19-year-old male passenger from Pimpama, was treated at the scene before being transported to Gold Coast University Hospital in a critical condition.
Another passenger, a 20-year-old female from Western Australia, was also transported to Gold Coast University Hospital with suspected spinal injuries.
The driver, an 18-year-old male from Coomera, was transported to Gold Coast University Hospital for assessment and is assisting police with their investigation.
Two other passengers, an 18-year-old female from Ormeau and 19-year-old male from Coomera, were assessed at the scene by paramedics.
Witnesses or anyone with information, including dashcam footage of the vehicle, is urged to contact police.
Investigations are continuing.
If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting.
Report crime information anonymously via Crime Stoppers. Call 1800 333 000 or report online at www.crimestoppersqld.com.au.