The ACT Coroner has revealed more details about the death of a 13-year-old Canberra boy, who died in Sydney earlier this month.
The coroner's office said the boy died at the Sydney Children's Hospital on August 12 after paramedics and a support crew of firefighters were called to his Canberra home on August 5.
The coroner's office confirmed the boy lived with his family and that the family was engaged with community and government services.
ACT police confirmed on Tuesday night that they were investigating the death and preparing a report for the coroner.
The cause of death is at this stage unknown.
The case was originally referred to the New South Wales Coroner, but was later transferred to the ACT.
Except for the Coroner, approaches by the ABC to others involved, including Canberra Health Services and the ESA, have drawn the same response, confirming the police investigation but saying there would be no further comment.
But it is understood the ESA is investigating the circumstances on the day the boy was taken to hospital.
United Firefighters Union ACT branch secretary Greg McConville did issue a statement raising concerns for his members.
"While the matter is investigated, firefighters are unable to defend themselves publicly, and this results in gross unfairness to both them as individuals and to the ACT Fire and Rescue service as a whole," Mr McConville said.
"I am confident that a due process of inquiry and an objective assessment of the facts will see our members exonerated."
The coroner is yet to set a hearing date until it has heard from police.