A 21-year-old cashier at a Lincolnshire petrol station suffered head injuries after two robbers attacked him.
The robbery occurred on Monday night at the Ulceby Cross Service Station when two men entered the shop and assaulted the cashier before stealing money from the till.
Police said the two attackers were described as white males. One was wearing a black tracksuit top and black tracksuit bottoms with a red stripe and the other had a grey hoody and blue tracksuit bottoms. They left the area in a black car, possibly a Renault.
Police were called to the service station at 9.45pm after staff raised the alert about the robbery.
The injured man was treated at Boston Pilgrim Hospital for a head injury but has since been discharged. His 60 year-old female colleague was shocked but otherwise unhurt.
Lincolnshire Police are asking anyone with information about the robbery to contact DC Gary Mathews by dialling 101 and quoting incident number 513.