Police say a woman demanded cash from two Dunedin shops late last night, using a piece of glass as a weapon and then escaped on a child's scooter.
They said she stole groceries from a dairy and cash from a Subway outlet.
No one was injured.
An image taken off closed circuit television was sent to investigating officers' smartphones to help identify the offender.
Community patrols, taxi drivers and Otago University security staff also helped.
A 31-year-old Dunedin woman will appear in court on Monday, charged with robbery.