PORT Macquarie-Hastings schools have issued warnings to parents to keep their children offline until a viral and highly graphic Tik Tok video is removed by the popular social media platform.

Footage is of a person taking their life has been uploaded online and is being streamed on Facebook, Twitter, Instagram and Tik Tok.

The video is described as "extremely graphic".

It appears the video has existed on social media for days, but now the platforms are struggling to delete it permanently as it is constantly being reposted and hidden in other videos

The warning to keep kids off social media only emerged in Australia on Tuesday (September 8).

A letter emailed directly to all parents of from Port Macquarie's Catholic high schools urged parents to speak with their children about the potential impact of the highly graphic content and to heavily moderate their social media platforms.

"Acknowledge that it exists and that it is distressing; counsel them not to view, save or share it," the letter said.

"Then discuss the matter with your child. If your son or daughter discloses that he or she has watched the video, you may need to seek assistance."

Prime Minister Scott Morrison today (September 9) demanded Tik Tok remove the video immediately.

Predators are reportedly using innocent clips to lure children into watching the suicide video.

The prime minister said the laws and standards of behaviour for the real world must also apply online.

"No child should be exposed to horrifying content like this," Mr Morrison said on Wednesday.

"Platforms like TikTok need to put in more resources to detect and tear down this sort of harmful content. That is their responsibility."

Mr Morrison said Australia's eSafety commissioner was engaging closely with TikTok to get the video removed.

Tik Tok said it was desperately working to remove the footage from its network.

"We're aware that clips of a suicide that was livestreamed on Facebook have recently circulated on other platforms, including TikTok," the company said.

"Our systems have been automatically detecting and flagging these clips for violating our Community Guidelines."

The statement said the company was also banning accounts that attempted to share the clips.

"We're removing content and banning accounts that repeatedly try to upload clips, and we appreciate our community members who've reported content and warned others against watching, engaging, or sharing such videos on any platform out of respect for the individual and their loved ones," Tik Tok said.

If you or someone you know is in need of crisis support, phone Lifeline 13 11 14.