Forensics officers have been examining an alleyway in Three Bridges after a man died earlier today (Sunday January 19).
The site, off of Haslett Avenue East, has been cordoned off all day,
The 45-year-old Portuguese man was found unconscious at around 3.25am.
He was treated at the scene by paramedics but died in hospital.
Two men aged 33 and 48 and a woman aged 22, all from Crawley, have been arrested on suspicion of murder and are currently being questioned.
Anyone with information should call Sussex Police on 101 quoting Operation Atlas, email firstname.lastname@example.org or call the independent charity Crimestoppers anonymously on 0800 555111.