Human remains have been found near where a 12-year-old boy was taken by a crocodile in the Northern Territory.
Authorities have shot dead three crocs in the search for the reptile that snatched the boy while he was swimming with friends in a billabong west of Jabiru in the Kakadu National Park on Sunday.
Another boy, 15, was bitten but released by a croc during the attack.
Acting Police Commander Michael White says search teams have found human remains near where the boy was taken.
"(The evidence) strongly indicates the boy has died from the crocodile attack," Acting Commander White said in a statement on Tuesday.
"Further DNA testing will be conducted to confirm the identification.
"No specifics will be given in relation to the trauma or type of evidence located out of respect for the family. This is now an investigation for the Northern Territory Coroner and a brief will be prepared."
The boy's distraught family have been notified of the discovery.
Authorities have been shooting crocs and cutting open their stomachs open in the hope of recovering the boy's body.
Three crocs have been shot, one measuring 2.5m, while the other two were 4.3m and 4.7m long.
"If you know anything about crocs, they're some very big scary monsters," a police spokeswoman told AAP.
"There is no way, if those creatures got hold of you, that you'd be able to get away."
Police warned people to stay out of waterholes during the wet season.
"It's quite incredible the amount of rainfall that we have here in the Territory and the reality is there could be crocs in every water body," the spokeswoman said.
"Just don't go in."