Police are investigating a serious traffic crash that occurred at Cecil Plains last night.
Officers were called around 9.50pm after a sedan travelling on Dalby Cecil Plains Road lost control and struck several trees.
An 18-year-old male passenger and a 24-year-old female passenger were both airlifted to the Princess Alexandra Hospital with serious injuries.
The 24-year-old male driver and a 16-year-old female passenger were treated on scene for minor injuries.
The Forensic Crash Unit is investigating.