A man is in a serious condition in hospital after being found in Spalding, with officers at a loss as to how he sustained his injuries.
Lincolnshire Police were called to Winsover Road at just after 7.15pm on Sunday, October 16, to find a 34-year-old man seriously injured.
Officers do not know when or how the man was injured, but believe it could have been as a result of a fall or an assault.
The man was taken to hospital where he is currently receiving treatment.
Police are urgently appealing for any witnesses who can help establish a full picture of what has happened.
Anyone with information should call Lincolnshire Police on 101 quoting incident number 368 of October 16.