Lincolnshire Police are trying to trace the man pictured in relation to a double stabbing in Lincoln.
The attack took place on Monson Street, near the junction with High Street, at around 5.30pm on December 11.
The two men, a 20-year-old and a 33-year-old were attacked by a man who was carrying a kitchen knife.
Both men suffered minor injuries and were treated at Lincoln County Hospital for superficial cuts.
This is thought to be an isolated incident and at this stage this is not thought to be a threat to the wider public, police said.
Call DC Lorrain Speight at Lincoln CID on 101 with information quoting incident number 340 of December 11, or call Crimestoppers anonymously on 0800 555 111.