A man has died following a single vehicle traffic crash this morning.
Preliminary investigations indicate around 2.30am a Hyundai station wagon was travelling west along the D'Aguilar Highway.
The vehicle appears to have left the roadway between Kilcoy and the Brisbane Valley Highway and rolled down an embankment.
A 30-year-old woman from Toogoolawah was airlifted to the Royal Brisbane and Women's Hospital in a serious but stable condition.
A 20-year-old man from Mount Kilcoy was declared deceased at the scene.
The Forensic Crash Unit is investigating.
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 or call 131 444.
You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, via crimestoppersqld.com.au 24hrs per day or call 1800 333 000.