Three people have been arrested after a man was found with stab wounds in the city centre.
All three have been released on bail while officers continue their search the man pictured on CCTV.
Officers were called to St Benedict’s Square at 1.58am on July 21.
Two people were arrested at the scene on suspicion of grievous bodily harm, but a third has now been arrested.
The victim is in Lincoln County Hospital with serious but not life-threatening injuries after he was stabbed with what’s believed to be a broken bottle.
Police are still looking for the man pictured. Anyone who has seen him or has information should contact police on 101 quoting Incident 53 of July 21.