A large number of cigarettes were stolen when masked robbers targeted a Post Office.
Three suspects walked into the branch in Longfellow Drive, Worksop, at around 4.30pm on Christmas Eve.
After a brief struggle with a female member of staff they loaded the cigarettes into back packs and left the area on bicycles in the direction of Plantation Hill.
The victim was not seriously hurt.
Officers have carried out extensive local enquiries and are now appealing for additional witnesses and information.
Detective Chief Inspector Kim Binns, of Nottinghamshire Police, said: “This was a frightening and distressing ordeal for the victim and we area determined to track down all those involved as soon as possible.
“We would like to speak to anyone who saw three men on bicycles either before or after the time of the incident. I would also urge anyone living nearby to check any CCTV or dashcam footage they may have that may have seen the suspects passing by.
“We would also like to speak to anyone who has been offered UK-branded cigarettes for sale at a discounted price since the incident.”
Anyone with information is asked to call 101 quoting incident 421 of 24 December 2021.