SOUDERTON, Pa. (CBS) – Students at Souderton High School are being sent home after a threatening note was found in a school bathroom.

When the note was found, students were evacuated to the football stadium. With temperatures around 40 degrees, district officials made the decision to send students home rather than have them sit outside while the school was searched.

As a precaution, students were not permitted back in the building to collect their belongings. The district says they’ll have to wait until Thursday morning.

District officials sent an email to parents saying, after a thorough search, the high school was declared safe.