Horrifying moment a critically injured young woman is pulled from the wreck of a bus and airlifted to hospital where she is fighting for life alongside another passenger with 17 others injured in the crash

A man and a woman are fighting for life after a horrific head-on collision between a bus carrying 20 passengers and a car.

Emergency services rushed to Logan, about 10.20am on Sunday after the vehicles crashed on Mundoolun Road, Mundoolun, in southeast Queensland.

Queensland Ambulance Service said 19 people were rushed to different hospitals with varying injuries. 

The woman, aged in her 20s, was cut from the wreckage by fire crews and treated by paramedics, then airlifted to Gold Coast University Hospital.

A man was later airlifted to Princess Alexandra Hospital in a critical condition.

A man and a woman have been airlifted to hospital in a critical condition after a horror head-on collision between a bus and car in Queensland's southeast. Pictured: A helicopter arrives at the scene

Paramedics treat he young woman at the site of the Mundoolun crash, which has injured 19 people  

'A further nine patients, one a female with a chest injury, were transported via road stable to Princess Alexandra Hospital and eight stable patients were transported to Logan Hospital,' Queensland Ambulance said.

'Three patients were assessed at the scene however declined further transport.' 

Queensland Fire and Emergency Services said five fire crews were dispatched to the scene at 10.15am to free two people from the wreckage. 

Firefighters used hydraulic tools to rescue the two badly injured passengers with one freed by 11.26am and the second at 11.39am.

The crash crash occurred close to the Mundoolun Estate on John Collins Drive. 

Queensland Police said the two critical patients were the drivers of the bus and the car, but it was not yet clear who was driving which vehicle.

Police are yet to determine where the bus had come from and where it was heading when it crashed on Sunday morning. Pictured: A map shows the region where the vehicles collided

It said the same two people were believed to be those cut from the vehicles. 

Police said it was a 22 seater bus, which is believed to have been at full capacity. 

Police are yet to determine which company owned the bus, where it came from, or where it was headed.

Emergency services remain on the scene and the forensic crash unit is investigating. 

Traffic diversions are in place and motorists are urged to avoid the area.  

Emergency services remain on the scene as an investigation is launched into the cause of the collision