HAYSVILLE, Kan. (AP) — Four Kansas middle schools students were taken into custody after officials became aware of social media posts threatening violence at the school.

Haysville Police Chief Jeff Whitfield said in a statement that Haysville Middle School staff and the school resource officer learned of “threatening messages made via the internet” Thursday morning. He says the threats involved several students causing violence against classmates and staff members at the school.

The Wichita Eagle reports four students were arrested. School District spokeswoman Liz Hames says the district is taking disciplinary action and the students could also face criminal charges.

Haysville is a town of about 10,000 residents about 10 miles south of Wichita.