Police are investigating an incident at Cairns this evening where a shop keeper was threatened with a syringe.

Initial investigations reveal at about 5:30pm a man entered the business on Reservoir Road Manoora and threatened a staff member with a syringe.  The female staff member has screamed and a customer who had just left the store returned.

The man with the syringe has then fled the store and was last seen heading north west across Reservoir Road.

The man is described as in his twenties, 160cm, of Caucasian appearance and slim build.

Anyone who may have witness the man near the store or has further information in relation to the matter is urged to contact Crime Stoppers.