The cause of death for an Indigenous man who fell unconscious and died amid a struggle with Queensland police officers remains unknown, the police force says.
The 27-year-old man could not be revived after what's been described as a "violent struggle" with two officers in the regional Queensland city of Toowoomba on Thursday.
An investigation into the incident is underway, with the two officers involved taken to hospital and later released.
"An autopsy was conducted yesterday, and the cause of death is unknown at this time," the force said in a statement on Saturday.
The officers went to Stone Street, a Wilsonton cul-de-sac, about 12.30pm on Thursday after a member of the public reported seeing a group of people behaving suspiciously in a vehicle.
Queensland Police Assistant Commissioner Mike Condon on Thursday said that by the time officers attended the street, they had determined the Subaru was a stolen vehicle.
The officers then sought to detain those in the car.
"A 27-year-old male person became unconscious, whereby police immediately provided first aid," Mr Condon said, declining to comment on how the man became unconscious. The man ultimately died at the scene.
Two other men fled after police arrived and are yet to be found.
Investigators are pressing on with witness interviews and had been doorknocking the area, police said on Friday.
Queensland Police said on Saturday the Ethical Standards Command were continuing to investigate the incident.