Police are investigating after a supermarket on University Way, Sippy Downs was robbed last night.
Around 9pm a man in the store approached the checkout with a number of items before producing a syringe and threatening the female operator.
After obtaining an amount of cash the man then fled the store and was seen getting into a car, believed to be green in colour.
He is described as being of Caucasian appearance, with dark brown hair. He was wearing a dark coloured t-shirt, light coloured pants and white shoes.
The console operator, a 23-year-old woman, was not physically injured during the robbery.