Police in Inverness are re-appealing for information, a month on from an attempted robbery at Greig Street Stores.
A man entered the shop at around 8.10am on Sunday, December 24, 2017 and threatened a member of staff with a weapon, demanding money.
The man ultimately left empty-handed after being deterred by the shopkeeper and nobody was injured.
Enquires have been ongoing since the incident last month and now officers are again appealing for information from members of the public.
Officers are keen to speak to anyone who was in the Greig Street area on the morning of Christmas Eve who may have seen the man entering or leaving the shop.
The man is described as being white, aged about 25-30-yearsold, medium height with a thin build and clean shaven.
He spoke with a local accent and was wearing a dark hooded top with the hood up and dark jeans.
Detective Constable Jack Weatherall said: "I would like to reassure local people and the wider public that we have been carrying out extensive enquiries to identify the individual involved.
"Nobody was hurt in the incident and nothing stolen. However, this was still a frightening experience for the shop worker involved and it was through their bravery that the man left empty-handed.
"This appears to have a cowardly and opportunistic attempt to steal from the store.
"All lines of enquiry, including extensive analysis of CCTV in the area, are being progressed to trace the man involved."
Police are especially keen to speak to four men who were seen on the city centre side of the Greig Street Bridge at around that time, who may have information which could prove helpful.
The men who were all seen separately were all wearing dark hooded tops and dark trousers at the time.
Detective Constable Weatherall added: "We would like to speak to each of these men so if you were in the area or recognise yourself from that description please make contact with us.
"I would also ask anybody who was on Greig Street or in the surrounding area on the morning of Christmas Eve to get in touch.
"It could be that you saw that something which may be beneficial to our investigation but did not think anything of it at the time.
"I would urge you to think back and let us know if you did see something could prove significant to us."
Anyone with information can contact CID in Inverness by calling 101, quoting reference NN32547/17.
Alternatively you can contact Crimestoppers on 0800 555 111 to pass information anonymously.