A woman in her 20s was taken to hospital with serious injuries after an assault in Boston.
Lincolnshire Police attended a report of violence on South Street in the early hours of Sunday, October 21.
A man, also in his 20s, was arrested on suspicion of Grievous Bodily Harm and has since been bailed.
The woman was taken to Queens Medical Centre in Nottingham, where she is being treated for her injuries.
Anyone with information about the assault is being urged to contact the police, quoting reference 69 of October 21.