Northern Territory police have killed two crocodiles during their ongoing search for a 12-year-old boy taken by a crocodile in billabong.
The boy was swimming with friends at a billabong near Jabiru at Kakadu National Park on Sunday when he was attacked by a saltwater crocodile.
Sergeant Stephen Constable said police located two large crocodiles in the early hours of Monday morning.
"One (was) 4.3 metres; one (was) 4.7 metres," Sgt Constable told the ABC.
"Both of those were shot and removed from the area.
"We've since had a look at both crocodiles and neither of them had anything in their stomachs, and we're going to continue the search today."
Another boy, also 12, was bitten by a crocodile during the incident, police say.
The missing boy was swimming in the billabong with a number of other young boys when he was taken.
Local police and National Parks rangers continue to scour the area.
Sergeant Constable earlier said there hadn't been a "croc attack around here for quite a long time".
"But crocodiles are prevalent in these waters and you always have to be careful," he said.