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Shooters are being rushed to a waterhole where two large crocodiles were spotted amid a search for a 12-year-old boy's body in the Northern Territory.
Authorities have already shot dead three saltwater crocodiles during the search for the reptile that took a boy who was swimming with friends at a billabong near Jabiru in the Kakadu National Park on Sunday.
Another boy, 15, was bitten but released by a crocodile during the attack.
A police spokeswoman says a helicopter is flying shooters to where the two crocodiles were seen this morning.
"We hope they can retrieve those crocodiles, we're looking for a body at the moment, it's very sad," she told AAP via telephone from the park.
"It's a recovery process, not a rescue anymore."
A police helicopter, airboats and boats for shooters have been scouring the search area since Sunday.
The spokeswoman said three crocs have been shot, one that measured 2.5-metres, which police have not been able recover.
The two other reptiles were 4.3 and 4.7 metres long.
"If you know anything about crocs, they're some very big scary monsters," she said.
"There is no way, if those creatures got hold of you, that you'd be able to get away."
Police also warned people to stay out of waterholes during the wet season.
"The waterways are swollen because of the wet season, our search area is huge," the spokeswoman said.
"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.
"Just don't go in."