Queensland's police commissioner says it is an "absolute miracle" no one died in a head on collision between a patrol van and a ute driven by a man allegedly fleeing a stabbing.
Katarina Carroll says the 37-year-old senior constable driving the van is in a stable condition in intensive care after "extensive surgery" overnight but will require months' of rehabilitation.
However she was surprised no one was killed after watching the "confronting" dash cam footage of the crash that hospitalised another two officers aged 24 and 23 - the latter a recruit yet to be sworn in - and the man.
"Thankfully all officers are safe and alive," Ms Carroll said on Sunday.
"If you saw that video, I just don't know how people survived. There was no reducing of speed by the offending vehicle. It is absolutely extraordinary.
"It is extraordinarily confronting and how they survived is just an absolute miracle."
Officers were heading to the scene of a reported stabbing at Moon Street in Caboolture before 3pm on Saturday when they collided with a white ute police believe was being driven by the alleged assailant.
Superintendent John Hallam confirmed they were investigating whether the man deliberately drove into the van.
"It is really difficult to say at this point in time," he said.
But asked to describe the ute driver's actions on Sunday, Ms Carroll said: "Reprehensible.
"Not only are officers' lives at risk but other people's lives are at risk.
"He was the initial offender in this ... job we went to and he put many people's lives at risk on that road ... it is just unacceptable."
Supt Hallam said the senior constable driving the van had tried to avoid a collision amid congested traffic by slowing down and veering toward the road's left shoulder before the impact.
"He didn't have much space to go, he had an embankment and a telegraph pole before him as well," Supt Hallam said.
The senior constable suffered "quite significant" injuries believed to be to the leg, chest and arms.
"That officer has been through surgery for several hours overnight. I would say there is many, many months of rehab and care before that officer will be back with us," Ms Carroll said.
The other two police officers are believed to be in a stable condition and are expected to be released from hospital on Sunday.
The driver of the ute is still in hospital with what are believed to be serious leg and chest injuries.
Assistant Police Commissioner Brian Connors said the ute driver and the man allegedly stabbed on Saturday were believed to be associates.
Ms Carroll, Police Minister Mark Ryan and Queensland Police Union boss Ian Leavers travelled to the crash scene on Sunday morning.
Mr Leavers said support would be provided to not only the injured officers but their families.
"Behind every police officer is an extended family and they are suffering as well at this point in time," he said.
