A police motorcyclist has suffered serious and significant injuries after running into the back of a car in Adelaide.
The force has described the crash as a "general traffic incident" and says the officer was "definitely not" involved in any form of pursuit.
"We can rule that out," Inspector Ben Spencer told reporters on Friday.
However, he says major crash officers are investigating and are "keeping an open mind" on the cause of the crash.
"We'll look at all the circumstances around the collision," Insp Spencer said.
"We will investigate the matter and if charges are appropriate, whether it's against the police officer or the other driver, we'll do what is appropriate."
CCTV footage from the police officer's camera will be checked and any witnesses have also been asked for come forward.
The 44-year-old senior constable, who was on general duty at the time, was admitted to the Royal Adelaide Hospital with serious injuries to his arms and head but they were not believed to be life threatening.
Insp Spencer said police were grateful to members of the public who stopped to help the officer.
The driver of the car was uninjured in the crash, which disrupted Friday morning commuter traffic along Grange Road.