Six people have been hurt - two critically - after the car they were in hita tree on Durham St in Ngāruawāhia.
A St John Ambulance spokeswoman said all six people were taken by ambulance to Waikato Hospital around 7pm. Two patients were in a critical condition and four had serious injuries.
The crash happened in a residential area 20km northwest of Hamilton.
The street was closed, but no other traffic was affected, a police spokeswoman said.
The Serious Crash Unit was investigating.