Lincolnshire Police are hoping residents may recognise the man in this CCTV image, who could have information regarding an assault on a woman in Lincoln.
The incident happened at around midnight on April 18 on Kesteven Street.
A woman was walking home when she was grabbed from behind and assaulted her. He then punched her in the face.
Officers believe that the man was in the area at the time of the incident and could have information on the assault to help the investigation.
They are appealing for him or anyone who may know him to get in touch.
Anyone with information on the incident should contact DC Cath Leeman at Lincoln CID on 101, quoting incident number 7 of April 18.