Further support is set to be announced for the West Australian investigation into the disappearance of four-year-old Cleo Smith.
Premier Mark McGowan and Police Minister Paul Papalia are expected to front the media on Thursday alongside WA's deputy police commissioner Col Blanch.
They are set to make an "important announcement" to support the investigation which has been dubbed Taskforce RODIA.
Police have acknowledged there is evidence to suggest Cleo was taken from her campsite but insist they haven't given up hope of finding her alive.
It has been confirmed the family's tent was found open at a height Cleo could not have reached when she disappeared from the popular Blowholes site, on WA's northwest coast, in the early hours of Saturday morning.
Her red and black sleeping bag is also missing.
Homicide detectives are assisting local police and investigators have spoken to up to 20 registered sex offenders in the Carnarvon area, but there are currently no suspects.
Detectives are also re-examining nearby shacks along the coastline as the search enters its sixth day.
"There's circumstances around her disappearance that make it very concerning and it's things like the fact that the (tent) zipper was allegedly up so high, the sleeping bag is missing," Inspector Jon Munday told reporters on Wednesday.
"We are hopeful that Cleo is still alive and we're operating on the premise that she is still alive, so we're going to keep searching until we find her."
Inspector Munday said the family were Carnarvon locals and he understood they had set up their tent "in the same vicinity as people they knew".
Cleo's mother Ellie Smith has said the little girl would never wander off on her own and someone must know where she is.
She said she and her partner Jake Gliddon had last seen Cleo about 1.30am on Saturday in the family's tent. They woke around 6am, when Cleo's baby sister Isla wanted a bottle, to discover Cleo was gone and the tent was "completely open".
"She would never leave us, she would never leave the tent," Ms Smith said, describing Cleo as a beautiful and delicate girl with "the biggest heart".
© AAP 2021