A man in his 50s was arrested on suspicion of murder after a woman was found in a caravan in Ingoldmells.
As previously reported, emergency services were called to Summerlands Caravan Park at around 10pm on Wednesday, May 29.
A woman in her 60s from Nottingham was found with serious injures and was treated at the scene by the ambulance crew, but died a short time later.
A man in his 50s from Nottingham was arrested on suspicion of murder in connection with this incident. He remains in custody.
A Home Office post mortem will be carried out on Friday, May 31 to establish the cause of death.
Anyone with information regarding the incident should call Lincolnshire Police on 101 or via email at [email protected] quoting incident number 447 of May 29.
It can also be reported through the independent charity Crimestoppers on 0800 555 111.