Some overseas websites have speculated whether the remains belonged to Madeleine, AAP reported.
"There is absolutely no evidence at this point in time to suggest that the child concerned is Madeleine McCann," South Australian Police Commissioner Grant Stevens said.
"We're prepared to consider any possibility but to suggest something like that at this point in time would purely be speculation for the benefit of getting attention."
Three-year-old Madeleine went missing from her holiday apartment in Portugal in 2007.
South Australian police believe a fair-haired girl aged between 2 and 4 is the murder victim whose remains were found near Wynarka, in the Murray Mallee in the Riverland, earlier this month.
Detective Superintendent Des Bray previously said she could have died up to eight years ago.
When asked about whether the girl could be Western Australian child Lella McDougall, who went missing with her mother Chantelle in 2007, Commissioner Stevens said investigators were focused on South Australia.
"But we would be considering any missing child in terms of the match with what we have in the Riverland," he said.
