Police can now release the age of the occupants of the fatal crash in Porirua on Saturday night.

The deceased female passenger is 21 years old from the Wellington region and the driver who fled Police is 42 years old from the Horowhenua region.

The driver is going to be released into Police custody this morning.

He will appear in Wellington District Court later today on unrelated charges and a charge of failing to stop.

The investigation into the fleeing driver is ongoing and Police are not able to comment further on it at this stage.

Police are still working to inform the deceased's next of kin, some of whom are overseas.

The family of the deceased passenger have asked for privacy and request media do not contact them during this difficult time.

Source: New Zealand Police.