Forensic Crash Unit officers continue to investigate a fatal, single-vehicle-crash at Barkers Creek Flat yesterday afternoon.
At 3.15pm, emergency services were called to the scene following reports a blue Holden Commodore had crashed into a power pole.
The driver, a 31-year-old Nanango man and a passenger, a 20-year-old Tara man, both died at the scene.
A 28-year-old Kingaroy man, who was also a passenger, remains in the Princess Alexandra Hospital with serious injuries.
Forensic Crash Unit officers are appealing for anyone who witnessed the driving behaviour of the vehicle prior to the crash or who has relevant dashcam footage of the blue Holden Commodore, to contact police.
Investigations are ongoing to determine the cause of the crash.