Two people are being questioned on suspicion of murder after a 57 year old man was found dead in Boston.
Police were called to Norfolk Street on Friday 8 May at around 9.25pm after reports that a man had fallen and hit his head.
A 50 year old woman and 45 year old man were arrested and taken into custody.
A spokesperson for Lincolnshire Police said: "Investigating officers are keeping an open mind over what happened."
Anyone who has information is urged to come forward.