Northern District police are searching for a woman riding a bike after she allegedly robbed a service station at Salisbury, according to SA Police.
Just before 10pm on Thursday 25 October, a woman has entered a service station on the Salisbury Highway and started filling a bag with grocery items. When female staff approached the woman she produced a syringe and threatened the staff member, before leaving with the stolen goods.
The suspect is described as a woman of Aboriginal appearance with light brown hair and wearing a black coat, blue jeans and carrying a large white shopping bag.
She was last seen riding away on a bicycle towards the Salisbury Railway Station.
A police dog patrol was called in to search the area but the suspect wasn't located.
Anyone with information on the robbery is asked to contact Crime Stoppers on 1800 333 000.
