The Winsor Bishop boutique on London Street, Norwich, was attacked by a smash-and-grab moped gang shortly after 10.50am yesterday (August 5).
Norfolk Police said five men and a boy were arrested on suspicion of armed robbery a short time later, just off the A11 near Thetford.
They remain in custody and are being questioned by officers.
Onlookers have captured videos which show the men raiding the store and riding off on mopeds while people try to run after them.
It has not been confirmed yet whether anything was actually taken during the robbery.