Urban explorers are being called out for trespassing in Plano.

That’s a trend where people venture into areas off limits and post videos. Some of the content has prompted a warning from police.

By day, what used to be Armstrong Middle School is an active demolition. But after hours, the action doesn’t always stop.

Despite locks, a perimeter fence, and warnings to trespassers, videos on social media show people inside some Plano ISD schools, which closed earlier this year.

“Most the time you can’t keep kids in school. Now, they’re wanting to get in,” said Jerry Minton, public information officer for the Plano Police Department.

Videos shared on platforms like Instagram and TikTok provide eery perspectives of what’s left in hallways, gyms, and locker rooms of Armstrong Middle School as well as nearby Forman Elementary, which is now being torn down, too.

There are entire social media accounts filled with videos from inside abandoned and vacant buildings. They even have a nickname: Urban explorers.

But their content could come with consequences.

“It is criminal trespass,” said Minton.

Not only is it illegal, Minton says being inside a demolition zone is dangerous.

“Some of the dangers may not be what you can see. It may be things that are in the air. Some of these buildings are older, so you’ll have things like asbestos, chemical products that could be in the air in the process of being destroyed,” explained Minton.

Minton says the department received several reports of trespassers at Armstrong Middle School last week. One incident involved ten to twenty juveniles, he said.

“If you want to explore, find something that’s not as dangerous,” said Minton.

More security measures are being added, police say, like barriers, cameras, and increased patrols. They’re also warning that the city’s four closed campuses, Armstrong Middle, Forman Elementary, Davis Elementary, and Carpenter Middle Schools, aren’t places to play.

Days after their initial public warning, Plano police say they arrested four 17-year-old’s for trespassing at Armstrong Middle School. Police say none of them are from Plano.

The teens now face criminal trespassing charges.