Public help sought over knifepoint 4WD theft

Police investigating a theft at knifepoint of a 4WD in Oamaru are asking for the public's help to locate a woman, but warn she should not be approached.

Police said today Ariana Allen may be able to help them with inquiries into the aggravated robbery, which took place on Monday.

"Ariana should not be approached and any sightings should be reported to police immediately," police said.

On Monday police were called to the intersection of Ouse St and State Highway 1 about 12.51pm by the driver of the vehicle, who reported it stolen.

Police said at the time the 4WD was taken at knifepoint.