The "two unidentified females and one unidentified male" fled the scene in an unknown direction, police said.
They are described as being 25-30 years of age.
No injuries were reported and no one is in custody.
SEE ALSO | Gold Coast business owner calls on city to do more after thieves target dealership in smash and grab
Incidents of theft have increased on the Mag Mile recently. Earlier this month, a teenager was charged in connection with robberies that occurred inside the Zara and Nike stores on Michigan Avenue.