Mazda Demio owners are being warned to keep their "pint-sized pride and joy" out of sight and locked and alarmed after they have become an unsuspecting magnet for thieves.

A stolen blue Mazda Demio 2006 and a stolen black Mazda Familia 2002 were used as getaway cars in a crime spree on Saturday afternoon involving a group of masked robbers who broke into a motorcycle shop in Frankton before holding up a liquor store and dairy in Dinsdale.

The Demio was stolen from Frankton on Friday night and the Familia was taken from Chartwell on Saturday morning. The vehicles were last spotted fleeing a Dinsdale liquor store and dairy on Whatawhata Rd and heading east