A member of staff at Coral bookmakers in Chippenham was threatened by a man holding what appeared to be a gun and demanding money.
The suspected entered Coral Racing on New Road at 9pm last night (7 September) wearing a puffa jacket covering his face.
He went over to the counter and produced the suspected firearm threatening the person at the till.
He then left the with a quality of cash out the front door, and turned to meet a second man waiting at the back door.
The pair then headed towards the Dominos on New Road before turning in the direction of the town centre.
Wiltshire Police have shared CCTV pictures of the incident and are looking for witnesses.