The Forensic Crash Unit is investigating after a man died in a two-vehicle traffic crash in Childers overnight.
Around 6.30pm, a car travelling north on the Bruce Highway collided with a car travelling south, near the intersection of Old Creek Creek Road.
An 18-year-old Sippy Downs man, who was a passenger in one of the vehicles, was pronounced deceased at the scene.
Two other men, both aged 18, who were travelling in the same car were taken to hospital in a serious condition.
A 40-year-old woman and an 18-year-old woman, who were passengers in the second vehicle, were taken to hospital with non-life-threatening injuries.
The 56-year-old male driver of the second vehicle was not physically injured in the crash.
Investigators are seeking anyone who witnessed the incident or who may have dash cam vision to contact police.
If you have information for police, contact Policelink on 131 444 or provide information using the online form 24hrs per day.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, by calling 1800 333 000 or via crimestoppersqld.com.au 24hrs per day.