Arson Squad detectives will investigate following a fatal house fire in Croydon earlier this morning.
Emergency services attended at the Lusher Road address just before 4am.
The body of a man, still to be formally identified, was found in the house while a second man, also an occupant of the house, was not injured.
He was taken to hospital for observation.
A crime scene has been established and an arson chemist will attend the site this morning to assist in determining the cause of the fire.
Investigators urge anyone who witnessed the incident or with information to contact Crime Stoppers on 1800 333 000 or file a confidential report online at www.crimestoppersvic.com.au