Northern Territory police say investigations remain ongoing following an alleged domestic violence-related homicide in Alice Springs.
Emergency services attended a fire at a residence in the Hidden Valley Town Camp at 11pm on Friday.
Most of the fire had been extinguished by the time crews arrived but the alleged victim, a 34-year-old woman, suffered "extensive" burns.
She was rushed to Alice Springs hospital where she died from her injuries on Sunday.
The alleged offender, a 36-year-old man who was the woman's partner, was taken to the Royal Adelaide Hospital on Saturday morning with serious burns and remains in a critical condition.
Police are yet to interview the man and have not laid any charges.
Detective Senior Sergeant Mick Schumacher said it was still unknown how the fire started but confirmed that fuel was involved.
Senseless tragedy
Senior Sergeant Schumacher said the couple had been in an on-again, off-again relationship and had at least one child together.
"We believe the fire started as the result of a fight," he said.
He said police were reviewing more than a dozen witness statements from people who were inside the house at the time and nearby.
"Certainly there were bystanders there that did try and put out the fire," Senior Sergeant Schumacher said.
The couple were visitors to Hidden Valley Camp, one of 16 town camps on the fringes of Alice Springs.
Police are still trying to determine the couple's movements in the lead-up to the event.
"I've certainly spoken to a few people [at Hidden Valley] and they're horrified that this has happened in their community.
Walter Shaw, the head of Tangentyere Council Aboriginal Corporation which oversees the administration of town camps, said the organisation was "shocked" and "saddened by the tragedy at Hidden Valley".
He said Tangentyere had organised alternative accommodation for those who needed it while investigations were underway.
"Tangentyere continues to offer support to those impacted by this terrible event," he said.
Known risk
Senior Sergeant Schumacher said neither the woman nor the alleged offender had been on the Family Safety Framework — a joint agency collaboration for victims at imminent risk of domestic violence — but that police knew this woman was at risk.
It is the second high-profile alleged domestic violence-related homicide in Alice Springs this year, following the death in January of R Rubuntja, a prominent anti-domestic violence campaigner.
"I think police are doing as much as possible with regards to domestic violence in Alice Springs, and certainly within the southern region as well as North Territory," Senior Sergeant Schumacher said.
Domestic violence-related assaults rose 16 per cent in Alice Springs in the year to September.
Police are asking for anyone with additional information to contact police.
