On Wednesday, police issued a statement saying
they wanted to speak to Ariana Allen as part of their inquiries.
"Ariana should not be approached and any sightings should be reported to police immediately," the statement said.
Detective Sergeant Hannah Booth confirmed Allen was a passenger in the vehicle at the time of the incident. She said Allen had connections in Canterbury and Otago, and her whereabouts were the main focus of inquiries.
No arrests had been made over the alleged aggravated robbery and no-one else was being sought in relation to it.
On Monday, police were called to the intersection of Ouse St and State Highway 1 about 12.50pm by the driver of the vehicle, who reported it stolen. Police said at the time it was taken at knifepoint.
• Oamaru police (03) 433-1400, or Crimestoppers anonymously on 0800 555-111.
