Police close in on cause of family inferno horror

The children's mother, Samantha Stephenson, 28, and another woman survived the inferno, fleeing as the two-storey home was engulfed in flames.

The blaze damaged two neighbouring homes and left several people needing treatment for minor burns and smoke inhalation.

Police continue to probe the source of the fire, saying although they have not determined the fire was suspicious, some elements of the tragedy required closer scrutiny

The deadly blaze has left the small Moreton Bay community in shock. 

Detective Superintendent Andrew Massingham said on Thursday the autopsies had been completed and the results were being sent to investigators.

"And at this stage it's looking like I'll be able to provide some sort of an update on that investigation tomorrow (Friday)," he said.