A woman could be heard screaming and flames were seen coming from the windows of a three-storey house on fire in Neiafu on Tuesday morning.
Tonga Police said an inquest has determined Tu’imala Uinisē Moala, 46, “died from smoke inhalation and very severe burning”.
Her body was laid to rest yesterday.
The victim and her husband were in the building before realising the blaze had engulfed the house.
The husband managed to escape while his wife was trapped by the fire, Police said.
The building was well involved when firefighters arrived.
The fire was livestreamed on Facebook and it showed what appeared to be the woman yelling for help from inside an upstairs room.
The cause of the blaze is still unknown.