Detectives reveal new possibility in Cleo Smith's alleged abduction

Cleo Smith was reunited with her family after she was missing for almost three weeks.

Police in Western Australia are trying to determine if more than one person was involved in the alleged abduction of Cleo Smith.

The 4-year-old was allegedly taken from the family tent while camping at Quobba Blowholes, 75km north of Carnarvon, on October 16.

Cleo was missing for 18 days until she was rescued by police from a house in the West Australian town.

Detective senior sergeant Cameron Blaine said on Monday the investigation was going well.

"Our focus this week is for us to ascertain whether there was anyone else involved. That's why we are still here," he told reporters in Carnarvon.

The man accused of abducting Cleo, Terence Darrell Kelly, will remain in maximum security in prison in Perth until his next court appearance later this month.

More to come.