Police across Long Island are stepping up patrols at schools after unfounded threats posted on TikTok.

Nassau Police Commissioner Patrick Ryder alerted residents about a challenger posted on the social media app encouraging students to make a threat against their school on Friday.

"You get more points and more hits when you do a post," Ryder says. "The kids are pushing it out and they have no idea what they're getting themselves into when they do this."

He says the threats are made because students want to interrupt the school process. The repost goes from town to town and state to state so police don't know where it starts.

Connetquot School District sent out a robocall saying, "The postings warn of an unverified attack and unnamed school for Friday Dec. 17."

Officials in both Nassau and Suffolk say they know of no credible threats at this time but are still increasing patrols Friday.

A number of Long Island school districts have faced recent threats and the trend has residents fearful.

"Any time you hear something like that, it's scary," says Mia Vecchio. "No one wants to hear that."

The Nassau police commissioner says there is a 20% increase in school threated compared to 2019.

He says they visited 3,700 schools in a month, which is double the average of visits.