Staff at a bookmakers were allegedly threatened with a knife during a robbery at the premises last night (Sunday).
Lincolnshire Police are appealing for witnesses following the incident at William Hill Bookmakers on Wide Bargate, Boston.
A force spokesman said a man confronted a staff member as he was closing the bookmakers at about 10pm.
They said staff were threatened with a knife held by the man but no one was injured.
The man, described as 5ft 10ins with a pale complexion, skinny wearing a black jacket with hood up, left the scene with an amount of cash.
The Investigating Officer DS Remy Simon has asked anyone with information to call 101 or alternatively the independent charity Crimestoppers can be contacted on 0800 555 111 anonymously.