YORK COUNTY, Pa. (WHTM)– Police are investigating a threat made against a York County high school on Thursday, October 19.

York County Regional Police said there was a threat involving Dallastown Area High School and that students were dismissed early out of precaution.

According to Dallastown Area School District Administration, the early dismissal came after a student made a claim of a potential bomb in the high school via social media.

The school district’s administration said the district’s School Resource Officer and local law enforcement were promptly notified.

The school district notified families and community members on Thursday night that instruction would be held in-person for all students on Friday, October 20.

An investigation into the incident is underway.