Two 16-year-olds rammed police cars during a dangerous chase that hit speeds of up to 150km/h.
Police attempted to stop a car stolen from Taranaki Base Hospital just before 3pm on Sunday but it failed to stop and fled police, said Sergeant Bruce Irvine.
Police abandoned the pursuit after the driver started to reach dangerous speeds.
The vehicle was located again on State Highway 3 south of New Plymouth and police started following again while otehr officers set up cordons.
Road spikes were put in place on Egmont Road but the driver avoided them, irvine said.