A spear gun was used to threaten staff of a service station in Broome during a robbery on Monday night.
A man walked into the Mavis Road petrol station carrying a spear gun about 8pm, which he used to threaten staff members while demanding money.
Staff handed over cash and the man ran from the store and was last seen heading south-westerly towards Flowerdale Road.
The man was wearing a hooded jacket, dark coloured pants, a dark coloured wide brim hat and a scarf he used to cover his face.
Anyone with any information should call Crime Stoppers on 1800 333 000.