A scene examination of the Holland Road property would continue for several days.
"The forensic evidence gathered during the post mortem will assist in determining the direction of the investigation. We anticipate that we should be able to complete the formal identification process following the post-mortem."
Mr Keall earlier today said a rescuer who snatched a trapped baby and a four-year-old child from the fire prevented a "much greater tragedy".
The man pulled the pre-schooler out through a lounge window before going back into the house and rescuing the one-year-old, Mr Keall said.
"Had it not been for this person's actions we would be investigating a far greater tragedy."
About 30 police staff were working on the inquiry into the woman's death.
A 20-year-old man and a 15-year-old girl were discharged from hospital yesterday.
Neighbours said yesterday they heard a car screeching off from the house after the fire took over.