Two men stole cash in an armed robbery at a petrol station in Thetford.
The men approached the BP petrol station on the A11 on Saturday, March 25 shortly after 9pm.
One man stood at the door while the other suspect entered the shop, threatened the cashier with a knife and demanded money.
Cash was taken from the till and the suspects fled the scene across the forecourt and into woodland.
The member of staff was uninjured.
The robber is described as a white man and was wearing black bottoms, black trainers and a black coat with the hood up.
Officers are keen to hear from anyone who may have witnessed the incident or noticed two men acting suspiciously in the area between the times stated.
Anyone with information should contact Detective Constable Debbie Johnston at Thetford CID on 101 or call Crimestoppers anonymously on 0800 555 111.