A 17-year-old girl has been arrested in relation to the brutal car jacking in Panmure that hospitalised an elderly woman last week.
Two other suspects, under the age of 17, have been "identified," said a police spokeswoman.
The teen has been charged with aggravated robbery, theft and two charges of unlawfully taking a motor-vehicle, and will appear in the Auckland District Court this afternoon.
The two others are currently in CYFS custody on an unrelated matter and police are in the process of arranging to speak with them.
"Both are under the age of 17 and we are therefore limited to any further discussion on this aspect, but we can advise that we are not looking for anyone else in relation to this incident."