Cleo Smith: $1 million reward for information on missing four-year-old attracts several bounty hunters

Western Australia's acting police commissioner says the $1 million reward offered for information to find missing four-year-old Cleo Smith has attracted bounty hunters to the area where the child was last seen.

Cleo disappeared while on a camping trip with her family at the remote Blowholes campsite, about 50 kilometres north of Carnarvon, on Western Australia's Gascoyne coast.

Her parents awoke to find her missing and the family's tent unzipped to a height the diminutive girl could not have reached.

No trace of her has since been found and police say it is likely she has been abducted.

On Wednesday, acting police commissioner Col Blanch said the million-dollar reward offered by the state government last week had led to a flurry of activity in the Blowholes area.

"As you know, a $1 million reward was put out there to help us find Cleo, and I think people — whether it's for the money, or whether it's just to do the right thing and help find Cleo — people are up there trying to find what happened," he said.

“I just ask that people don’t put themselves in any danger in doing so."

He said police searches of the area had found nothing to conclude she had simply wandered off, but there was "still a lot of land out there to cover."

Police have in recent days made several visits to Cleo's family home in Carnarvon and collected samples from a campfire at the Blowholes site.

Supt Wilde said the girl's mother Ellie Smith and stepfather Jake Gliddon were not suspects.

More than 100 people who were at the Blowholes on the night Cleo disappeared have been interviewed, with police confident they have accounted for the majority of those who may have been present at the vast campsite.

Authorities have also received more than 200 reports of possible sightings of Cleo.

Authorities from around the world have offered to help the investigation which is also being assisted by the Australian Federal Police.