The family of a six-year-old girl who died from alleged neglect had contact with a number of South Australian government agencies, including police, before her death, authorities have confirmed.
Police have established a task force to investigate the death of Charlie, who was found to be unresponsive at a home at suburban Munno Para on Friday.
She died soon after arrival at hospital, with her death declared a major crime and being treated as a case of criminal neglect.
Four other children aged between seven and 16, and an adult sibling aged 29, have also been removed from the home.
Police Deputy Commissioner Linda Williams said a range of government agencies had interacted with the family and the extent of those interactions would form part of the investigation.
Dep Comm Williams said police would allocate all the necessary resources to determine what happened and whether any charges would be laid.
"We want to understand what happened to Charlie and how she ended up in the circumstances that she did," Dep Comm Williams said.
"The death of any person is tragic, but the death of a young child, a six-year-old girl, obviously causes concern for everybody to want to know how this occurred."
The deputy commissioner said conditions in the home were described as poor but was unable to elaborate.
Acting Premier Susan Close said, as an immediate response to the case, the government had ordered a review of the interactions between government agencies and the family over the past couple of years.
"The review will encompass the chronology of the services delivered and the agencies engaged," Ms Close said.
"It's important not to pre-judge what that review will find.
"What we need to do is go through the process and ask what interactions occurred, could they have been any different and are there any lessons."