Police are seeking sightings of a grey Mitsubishi Diamante believed to have been involved in a hit and run in Taitā, Lower Hutt, on Saturday afternoon.
Police first received a report of the car vs pedestrian crash on High St at around 12.10pm.
A woman, described by a witness as a young woman, was taken to Wellington Hospital with serious injuries.
The witness told the Herald she arrived about 20 seconds after the hit-and-run and a trainee nurse helped the injured victim.
She also said members of the community helped look after the woman and diverted traffic before emergency services arrived.