Lincolnshire Police are investigating reports of a knifepoint robbery in Lincoln city centre.
Pictures have circulated social media in recent days of a man who is being sought in relation to the incident, officers confirmed.
The robbery is said to have happened on Ripon Street, off Lincoln High Street, at around 11.30am on Saturday, November 10.
Police said no one was injured, and they are yet to make any arrests.
A Lincolnshire Police spokesperson said: “We can confirm that we would like to speak to the man pictured in connection with a robbery.
“The man was reported to have been armed with a knife. There were no injuries.
“The incident occurred at around 11.30 am.
“Anyone with information is urged to call 101 with incident reference 176 of 10 November.”