Armed robbery of a filling station in County Donegal 20 November 2014 Last updated at 13:32 A man armed with a gun has robbed a filling station in County Donegal. Police said the masked man was armed with a handgun, wore blue overalls and threatened staff. The masked man entered the Topaz filling station on the Lifford Road, Castlefin, at around 20:30 BST on Wednesday He escaped with several hundred euros.