At about 8.30pm yesterday a man entered the Blockbuster video store at Gawler and threatened a staff member with a knife.
The man demanded money before leaving on foot with a small amount of cash.
No one was injured as a result of the incident.
The male is described as Caucasian with an olive complexion and shoulder length black hair tied in a pony-tail, with a thin black beard and moustache.
He is aged in his mid to late twenties, about 175cm tall with a thin build and a gaunt appearance.
He was wearing a chequered hoodie top, black track pants, a black baseball cap and dark sunglasses.



