A robber on a mountain bike smashed open the tills at the Tesco garage in Corby and made off with a large amount of cash.
Police have released a CCTV image of the man they want to speak to in connection with the robbery.
The man, who was riding a black and green-coloured mountain bike, was seen approaching the filling station in St James Road at about 10.35am on Saturday (August 16).
A police spokesman said: “Once inside he produced a mallet-style metal hammer before jumping over the counter, smashing both cash tills open and seizing a large amount of cash. He was last seen cycling towards the bridge in Oakley Road.”
The robber was white, 5ft 9in, slim to medium built and was wearing a black hooded Adidas top with three white stripes down the front of each arm and its hood pulled up over a light-coloured baseball cap which had a Burberry check peak. He was also wearing black trainers, trousers and gloves.
Anyone with information is asked to call police on 101 or Crimestoppers, anonymously, on 0800 555 111.