Six students, aged 7 to 15, have been struck by an out-of-control car in a school car park north of Brisbane, leaving four in hospital with serious injuries.

Key points: Three children have been seriously injured, three others have minor injuries

Three children have been seriously injured, three others have minor injuries A 42-year-old father picking up kids was behind the wheel

A 42-year-old father picking up kids was behind the wheel Parents, including an off-duty nurse, were the first responders

Sergeant Greg Price said a local father, 42, was collecting his children at pick-up time from the Australian Christian College in Caboolture when he lost control.

He said the car hit two other vehicles in the car park before hitting a building.

"It was panic stations upon arrival," he said.

"There was a lot of distressed students, a lot of distressed parents.

"No-one knew what was going on. It was basically chaos."

Adam Flory from the Queensland Ambulance Service said the four students were stable.

"They're all doing well, and there's no life-threatening injuries," he said.

"Those four children have got extensive leg injuries but are stable and they’re going to make a good recovery."

Several police and paramedics attended the incident, with the car towed later in the afternoon. ( ABC News: Bruce Atkinson )

A teenage girl was treated for significant leg and pelvic injuries, and a second teenage girl had arm injuries and lacerations, paramedics said.

A young boy also had significant leg and wrist injuries, they said.

The trio was treated by paramedics and taken to the Queensland Children's Hospital in a serious condition.

Two other teenage girls and a younger girl were also taken to hospital in a stable condition with minor injuries, including lacerations and leg injuries.

The driver was taken to Caboolture Hospital as a precaution.

The Forensic Crash Unit has seized the vehicle for further testing.

"We need to interview numerous witnesses including staff, children and parents, as well as the driver, before we determine what action will be taken," Sergeant Price said.

Off-duty nurse a first responder

In a statement, principal Gary Underwood said two parents were also injured in the accident.

"The students have been taken to hospital. There were no critical injuries — the College will be keeping in close contact with all involved," the statement said.

"Thank you to the wonderful assistance provided by parents and staff, including a parent who is an off-duty nurse and was a first responder.

"Students and staff were counselled on the site and will be followed up on Thursday.

"School will run as normal with extra counsellors and ministers on hand to support the children."

The incident follows a horrific week on Queensland's roads last week, with four children dying in three separate incidents.

Two children were killed on March 18 in a single-vehicle crash at Peak Crossing, while three days later a three-year-old was killed after being hit by a ute at a service station in Caboolture North.

On Sunday, a nine-year-old girl was killed in a two-vehicle crash in central Queensland that also left a young boy with life-threatening injuries.