Robbers carrying a knife and crowbar tried to take cash from a service station in Northampton.
The robbery took place at the BP Service Station in Grange Park, Northampton, in the early hours of Tuesday, May 5. At about 1.50am, three men entered the shop and demanded staff give them access to the safe.
After trying to force open an office door, an alarm was activated and the men left the shop. It is believed they made their escape on foot.
The men were all white and wore dark clothing. Two of them carried weapons, believed to be a knife and a crow bar.
Witnesses, or anyone who saw anything suspicious in the area around the time of the incident, are asked to call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.