A driver in a stolen vehicle deliberately crashed into a police car chasing him, police say.
Anoff-duty police officer spotted the stolen vehicle at Mangere Bridge about 6.30am today and called 111.
"Shortly after, a patrol vehicle spotted the vehicle and pulled over to do a U-turn," police said.
"The offending vehicle has purposely driven into the police car and caused such significant damage that both vehicles were not able to be driven."
The officer was uninjured.