Detectives from the Arson and Explosives Squad are investigating a fire in Wantirna yesterday where a person was located deceased.
Emergency services were called to a fire at a residential property on Templeton Street about 8am on Wednesday, 11 December.
A person, believed to be a female resident, was located deceased at the property.
An 81-year-old Wantirna man was conveyed to hospital where he remains under police guard.
The exact circumstances surrounding the fire and death are still to be determined.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.