A woman had to be extricated from a vehicle after it crashed into a tree.

Emergency services, including the Trustpower TECT Rescue Helicopter were called to the crash near Ngatea, about 4.30pm.

A spokesperson for the rescue chopper says the female passenger had sustained a back injury after the vehicle had left the road and collided with a tree.

'NZ Fire had to extricate the woman from the vehicle due to her injuries.

'The woman was stablised at the scene by paramedics before being airlifted to Waikato Hospital for further assessment and treatment.”

Police are investigating the cause of the crash.