A CCTV image has been released of a masked robber who threatened staff at a Dudley off licence with a knife.

The robber ran into Caledonia Food and Wine just after 10.30am on April 5 and stole £500 from the till after threatening staff with the weapon.

He then left the store, in Blackacre Road, and walked off towards Rollason Road.

The suspect is described as white and was wearing a white t-shirt over his head with eye holes cut out, a dark hooded top, dark trousers and dark footwear.

DC Caroline Morris, who is leading the investigation, said: "This was a disturbing attack for the staff at the shop and fortunately they weren’t injured during the robbery.

"The robber wore a distinctive t-shirt over his head and we’re sure someone must know who he is."

Anyone with information that could help the investigation should contact DC Morris on 101 or call Crimestoppers, anonymously, on 0800 555111.