Two women, including the mother, who escaped a massive house blaze where a father and five children died will be interviewed by police as investigators probe previous call-outs to the home.
Queensland police said "some elements" of the house fire require "closer scrutiny" but have so far not deemed it suspicious.
The house fire on Queensland's Russell Island, near Brisbane, killed 34-year-old Wayne Godinet, his sons Zackary, 11, Harry, 10, four-year-old twins Kyza and Koah and Nicky, three.
The children's mother Samantha Stephenson, 28, and a 21-year-old female relative were able to escape the blaze, southeast of Brisbane.
The pair have been released from hospital and are now speaking with police to help with the investigation, according to 7News.
Detective Superintendent Andrew Massingham said the blaze remains under investigation by detectives who are keeping an "open mind" about the fire and have not ruled out foul play.
He revealed officers had "been to the residence in the past".
"The nature and frequency of our attendance there is subject to internal review and will form part of our investigation," he said.
Det Supt Massingham said specific elements require further investigation and wouldn't comment on whether there had been domestic violence incidents at the house in the past.
"It's important I tell you we are keeping an open mind with respect to this matter," Det Supt Massingham said.
Witnesses said Stephenson was seen screaming for help, telling emergency services her family was trapped inside.
The blaze spread to two other properties that were saved by firefighters but several neighbours required treatment from paramedics for smoke inhalation and minor burns.
Tributes pour in for five kids and 'superdad'
Tributes have started pouring in for the five children and Godinet who is being described as a "superdad" and was reportedly trying to rescue his children when he succumbed to the blaze.
Local woman Angela Dowson recalled the blaze saying Godinet warned Stephenson, who had escaped the fire, to stay back as he ran into the fire to try and save their children.
"I know he was a hero and he would have done everything in his power to get those kids out, so obviously it was impossible. I would call him superdad," Dowson said.
Moments after Godinet ran back in, the upper storey collapsed, according to 7News.
A neighbour said she had known the family for years and her children were friends with the kids who had died.
"I [have] seen them every day for years - the kids singing songs on the way to school," one neighbour told 9News.
"My friends looked after them. We all loved them dearly."
One mother explained how she had to tell her son his best friend was gone.
"He said, 'Mum, my best friend is coming to kinder?'" Zoe Perera told 9News.
"I said, 'No, he's not now, he's not coming to kinder no more', and he said, 'Yeah, he is tomorrow?' and I said 'No, he's not.'"
Family friend Lily Salter has set up a GoFundMe page for Stephenson, which has so far raised over NZD$32,000.
"We have started this GoFundMe to assist Samantha in the cost of putting her beautiful family to rest. Whatever you can donate will be appreciated," Salter wrote.
"She has lost everything. We also appreciate you giving Samantha some time and space to grieve at this time as you can imagine."
