Police are appealing for information and witnesses after a 45-year-old man was assaulted in Lincoln on Tuesday, May 12.
Investigating officers believe the assault might have taken place in the Napier Street/Cannon Street area at around 8pm last night.
A local man was taken to hospital for treatment.
Officers would like to hear from anyone who may have seen him in the area or around High Street last night.
Police believe he was wearing a green army jumper with a t-shirt tied around his waist, and would have had a brindle coloured Staffordshire Bull Terrier with him.
Anyone with any information is asked to contact Lincolnshire Police on 101 quoting incident number 4 of May 13.
Alternatively contact the independent charity Crimestoppers anonymously on 0800 555 111.