Lincolnshire Police are looking for the man pictured above after a man was found with stab wounds in Lincoln city centre.
Officers were called to St Benedict’s Square at 1.58am on July 21.
A man was found with stab wounds, which are believed to have been caused by someone using a broken bottle.
He was taken to Lincoln County Hospital with serious injuries.
Two people were arrested at the scene on suspicion of grievous bodily harm. They remain in police custody.
If you have seen the man pictured, or have information, contact police on 101 quoting Incident 53 of July 21.