Human remains have been discovered inside a crocodile after a father was dragged into the water in front of his family while fishing on holiday.

The 40-year-old was attacked just after 2pm on Saturday in the Annan River, south of Cooktown, in Far North Queensland, Australia.

Wildlife rangers shot and killed the 4.9m long beast on Monday following the horror incident.

He was dragged into the river as his wife and children watched on nearby.

In a statement, Queensland Police said human remains were found inside the animal.

A police spokesperson said: "A formal identification process is underway, however it is believed the remains are those of a missing 40-year-old NSW man.

"Further testing will be conducted to determine a positive identity. The search and rescue operation has been suspended.

"Police are working with wildlife officers as investigations continue."

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A series of videos featuring people throwing fish and meat into the water have since emerged online near where the father was snatched.

In one video, a child can be heard saying "attack" just before a crocodile appeared and grabbed the food being thrown.

It remains unknown when the video were filmed.

A Queensland Department of Environment and Science said it was "highly concerned" by the videos.

A spokesman said: "It is illegal to feed crocodiles in Queensland, and anyone with information about the deliberate feeding of crocodiles is encouraged to call 1300 130 372 and report the information. Reports can be made anonymously.

"Feeding of crocodiles at riverbanks or boat ramps encourages them to hang around, waiting for their next meal.

"This can place future visitors to the area at a much greater risk of attack if they approach or enter the water.

"People should never feed crocodiles or give easy access to food or fish scraps."