A 24-year-old man was working at a bottle shop on Wilsons Road at Mount Hutton Sunday, when a man entered the store around 6.15pm and threatened him with a firearm.
He demanded cash before fleeing the scene toward South Street at Windale.
Lake Macquarie Police District officers were called a short time later and established a crime scene.
Police described the robber as a man around 180- to 185 centimetres tall, wearing dark clothing with his face covered.
Anyone who may have seen or heard anything suspicious in the area between 6pm and 6.30pm last night, or who may have CCTV or dashcam footage from nearby is urged to contact police or Crime Stoppers on 1800 333 000.
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