Human stays of a lacking fisherman have been discovered inside two crocodiles in a distant a part of northern Queensland in Australia.

Kevin Darmody was fishing with buddies by the Kennedy River in Rinyirru (Lakefield) National Park on Saturday afternoon when he disappeared.

Authorities imagine the 65-year-old from the city of Laura was taken after shifting to the water's edge.

Friends who have been with him on the time didn't see the assault, however reported listening to him yell, adopted by a loud splash.

Bart Harrison, who was not with the group, advised ABC News a good friend advised him concerning the frantic efforts to seek out Mr Darmody.

"One of the blokes that was with him just came running out waving his arms... saying, 'He's gone, he's gone'," Mr Harrison stated.

"Nobody actually saw it happen - everyone was just fishing, doing their own thing, spread out along the bank."

Two crocodiles have been shot useless by rangers upstream from the place Mr Darmody vanished through the search.

Police imagine the human stays discovered within the crocodiles, which measured 4.1m (13.4ft) and a pair of.8m (9.1ft), are these of the fisherman.

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Queensland Police stated: "Human remains were located within two crocodiles euthanised by department of environment and science (DES) wildlife officers.

"Police imagine the stays are these of the lacking 65-year-old Laura man, pending the formal identification course of.

Officers imagine the 2 crocodiles (4.1m and a pair of.8m) have been concerned in an incident with the 65-year-old and have been situated upstream from the place he was final seen.

"Search and rescue operations in Lakefield have been discontinued at this time. Police will now prepare a report for the coroner."

Mr Darmody was final seen at Kennedy Bend, a campsite on the nationwide park.

According to a authorities web site, "large crocodiles are frequently seen" within the space.