Detectives have appealed for witnesses following a robbery at a Co-op store in Redbourn on Saturday (April 7).
Two men entered the store on the High Street at around 6.45pm and threatened a member of staff.
One of the intruders then jumped over the counter and took cash from the till and a money box.
The pair have then left the store and ran through an alleyway leading to Crown Street where they got into a silver car and drove away.
Both men were described as white and wearing face coverings and hoods. The first man was wearing a grey hoodie, while the second was dressed in all black.
Anyone with information about the incident should call Crimestoppers, the independent charity, anonymously on 0800 555 111.