Forensics crime scene investigators will be early on scene at the charred remains of the Spence house fire where a person's body was recovered on Tuesday afternoon.
The body of a person was removed in a sealed bag from the house late yesterday afternoon.
There were no other people in the house at the time of the blaze.
Police say the cause of the fire will be suspicious until deemed otherwise.
A police guard was placed on the home overnight as investigators prepared to return on Wednesday and begin the difficult process of determining the ignition source.
ACT Fire and Rescue conducted a sweep of the property on Crofts Place after the blaze was extinguished and when an officer on their platform appliance detected what appeared to be a body, alerted police who were on scene.
"The fire was extinguished but, sadly, the body of a person was located inside the home," a police spokesperson said.
It is understood that the person who died in the fire lived in the house, although a formal identification process is under way. It is expected that the ACT's chief pathologist, Dr Johan Du Flou, will be tasked with the forensic examination on Thursday.
Police have deemed the housefire suspicious and are investigating the incident and the circumstances of the death.
The spokesperson said a man was assisting officers with their enquiries. That person was released without charge,
"Police would like to reassure the community that there is no ongoing threat to public safety," she said.
The fire was reported about 10.45am on Tuesday morning.
Emergency services were called after reports of "smoke coming out of the front door" of the house.
Initially, the triple zero call was said to have come from inside the house but based on the description of the smoke an ACT Emergency Services Agency spokesperson said they believe a neighbour or passer-by had called it in.
"It was quite a large blaze," he said. " It was a serious house fire and there has been major damage to the structure [of the home]"
'Fatal' house fires
This is the second "fatal house fire" this year, according to police.
Previously, on May 22, the body of 36-year-old Kot Ador Deng was found inside his residence at Giltinan Place, Holt, after firefighters extinguished the fire.
Acting Superintendent Stephen Ladd had said the man died of smoke asphyxiation. He also said the property was almost completely destroyed and petrol was found in the house after the fire.
Police arrested a 38-year-old man on May 31. He was charged with arson and murder, and entered not guilty pleas in court. Police told media the two men knew each other and alleged there had been some sort of dispute between them.
