Police are currently at the scene of an aggravated robbery at Gawler South.
Just after 6pm, a man armed with a knife entered a deli on Adelaide Road and demanded money.
He fled on foot with an amount of cash, and was last seen headed towards the railway station.
No one was injured during the incident.
He is described as being aged in his late teens or early twenties with curly hair, and was wearing a black t-shirt and hat.