Port Macquarie shark attack: Truth about shocking video of Kai McKenzie that mysteriously leaked from inside a NSW police station

A chilling video of a shark attack leaked online from a police station computer has emerged as that of a surfer who lost his right leg.

The eight-second video that has been circulating online in recent days appears to have been filmed on a handheld device in a police station, with the terrifying attack shown on a computer screen.

Kai McKenzie, 23, lost his right leg after being attacked by a suspected three-metre great white shark on North Shore Beach in Port Macquarie, on the New South Wales north coast, on July 23.

He was taken to Newcastle’s John Hunter Hospital with severe blood loss and underwent major surgery the following day.

The footage is believed to have been taken by a beachgoer and shows the terrifying moment Mr McKenzie was attacked.

The image shows a figure in a wetsuit desperately trying to paddle his surfboard away from a large dorsal fin and tail in the ocean, before being pulled underwater.

Authorities believe the leak originated through a police station and have vowed to take “appropriate action.”

A New South Wales police spokesperson told Daily Mail Australia on Tuesday night that the investigation into how the video was leaked and posted online had not changed, referring to an earlier statement last week.

The video was filmed from a screen that appears to be in a NSW police station and shows a surfer paddling out before a huge dorsal fin and tail appear in the water and drag them underwater.

Kai McKenzie, 23 (pictured), was attacked by what is believed to be a 3-metre great white shark on North Shore Beach in Port Macquarie on July 23

Kai McKenzie, 23 (pictured), was attacked by what is believed to be a 3-metre great white shark on North Shore Beach in Port Macquarie on July 23

“New South Wales Police are aware of a video circulating online and have launched an investigation into how the video was made public,” the spokesperson said.

‘New South Wales Police will not tolerate this type of behaviour and will take appropriate action pending the outcome of the investigation.’

The police spokesperson confirmed that the investigation is being carried out by the Professional Standards Command (PSC).

The NSW Police website states The Professional Standards Command ‘is a specialist command reporting to the Deputy Commissioner for Investigations and Counter-Terrorism.’

‘The PSC is responsible for setting standards of performance, conduct and integrity within the NSW Police Service.’

After the brutal attack, Mr McKenzie’s severed leg washed up on the beach and he underwent a marathon operation.

Mr McKenzie's surfboard is on display after the horrific shark attack at North Shore Beach in Port Macquarie on July 23

Mr McKenzie’s surfboard is on display after the horrific shark attack at North Shore Beach in Port Macquarie on July 23

Paramedic Kirrin Mowbray told reporters that McKenzie managed to fight off the shark before being swept back to shore by a wave.

Some viewers claimed the shark in the leaked footage was larger than the three meters estimated by experts.

In the leaked video, a poster can be seen above the computer screen with the text “respect, pride, trust” next to blue and white squares, which matches the New South Wales Police logo.

The same slogan and logo can be found on NSW Police merchandise, including lanyards and drink cups.

In front of the desktop screen where the video was playing, a used lunch box was visible.

Mr McKenzie is still recovering in hospital but has since given several updates on social media following a stay in intensive care.

“Man ohh f**king man to be here right now just to hold my beautiful Eve. And my family means the world to me. A few days ago I had a crazy shark attack (biggest shark I’ve ever seen). That was the craziest scene and scared the hell out of me,” he wrote.

On Monday, he shared a cheerful photo of himself in the hospital, surrounded by his loved ones.

“Is there anything missing?” wrote Mr. McKenzie.

“It’s so nice to have so many great people behind me. I really appreciate it.”

a GoFundMe created for Mr. McKenzie has so far raised more than $170,000 for the young surfer.