A man armed with a knife demanded money from the cashier of a Thetford petrol station yesterday evening (15).
Police have said the man left the Jet petrol station in Bury Road with an undisclosed amount of cash taken from a till. No-one was injured during the robbery.
Officers were called at about 8.23pm and the police helicopter was deployed to assist in the search for the offender.
Police have released a description of the armed robber as being white, in his 30s, about five foot six inches tall with dark hair. He was wearing a chequered tea towel or similar over his face. It is thought he was also wearing dark coloured trousers and a dark coloured jacket and had a carrier bag with him.
Enquiries continue and officers are keen to hear from anyone with any information relating to the robbery. Witnesses should contact Norfolk Constabulary on 101 or Crimestoppers anonymously on 0800 555 111.