A schoolgirl, 12, has been killed by a crocodile when she went for a swim in a river in Australia.

The tragic schoolgirl was dragged to her death in Palumpa, northern Australia after she vanished when she went for a swim.

The alarm was raised when she went missing after she was last seen swimming in Mango Creek.

Police tragically confirmed her remains had been found today, Thursday, July 4, despite a frantic 36-hour search.

Authorities described the scene as "particularly gruesome."

Northern Territory Police Senior Sergeant Erica Gibson said: "This morning, as a result of searching intensively overnight, the remains of the missing child were located in the riverway.

"It was particularly gruesome and a sad, devastating outcome. It was extremely difficult for the first responders involved in the search.

"As awful as the outcome is, it's been an incredible effort from the people involved. I certainly would commend the actions of everyone involved.

"They were diligent and worked relentlessly. However, for the family, it's the most devastating outcome possible for them.

"They are in a state of extreme shock and disbelief. "

Northern Territory police minister Brent Potter said officers had been authorised to "remove" the killer crocodile as he warned locals to be vigilant.

He said: "We live in a place where crocodiles occupy our water places... it's just a reminder to stay out of the water as best we can."

Sgt Gibson said a black crocodile was seen in the sea close to where the schoolgirl had been swimming as police used boats, helicopters and officers on foot to no avail.