A murder probe has been launched after a man's body was found in a quiet Lincolnshire village.
The 64-year-old was found injured at a property in Langtoft and died in hospital on 17 October.
A post-mortem examination carried out last week failed to find a cause of death and experts are now awaiting toxicology reports.
A 24-year-old man and a woman, 66, arrested shortly after the death have been released on police bail.
Det Supt Nick Howard said: "We are currently treating this death as suspicious until the cause can be firmly established.
"A Home Office pathologist has conducted a post-mortem examination and we are awaiting the results.
"The investigation team are exploring a number of lines of enquiry.
"However, our initial findings indicate that the incident is of a domestic nature."
He added: "I would like to diffuse any speculation surrounding the police activity in the village and to also reassure residents.
"Although the death of this well known local man is being treated suspiciously, we are not looking for further suspects within the village."