The Forensic Crash Unit is investigating a serious single-vehicle traffic crash in Logan on Friday, October 4.
Around 12.30am, a silver Holden Commodore was travelling east on Stockleigh Road in Stockleigh when it left the road and crashed into a tree.
The driver of the vehicle, a 23-year-old Park Ridge man, was transported to the Princess Alexandra Hospital with life-threatening-injuries.
The passenger, a 22-year-old Stockleigh man, was transported to the Princess Alexandra Hospital with serious injuries.
Forensic Crash Unit investigations are ongoing and will establish if speed was a contributing factor to the crash.
Investigators are appealing to any witnesses, or anyone with relevant dashcam vision to come forward.
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