UPDATE, 9AM: A female driver and three male passengers were in the Subaru WRX when it crashed into a tree in South Grafton overnight.
It is understood the driver suffered a broken pelvis and femur and multiple internal injuries.
The passenger in the front seat, who is believed to be her partner, was also trapped in the vehicle for up to an hour, and is understood to have been transported by ambulance to Coffs Harbour Base Hospital.
The two males in the backseat, one of whom is believed to be the brother of the male in the front seat, were taken to Grafton Base Hospital.
Bystanders told media sources that the female driver was a Hungry Jacks employee, and that the car had just left the fast food restaurant minutes before the crash.
ORIGINAL STORY: A 20-year-old Grafton woman was flown to John Hunter Hospital in a critical condition overnight after a crash at South Grafton.
At about 8.30pm on Monday night a Subaru WRX crashed into a tree at the intersection of Schwinghammer St and the Pacific Highway.
It took emergency services more than two hours to free the trapped female driver from the vehicle which was wrapped around a tree trunk.
The vehicle reportedly had multiple occupants at the time of the incident and a large crowd of youth lined the street as emergency services worked on rescuing the driver.
More details to come.