Police are investigating a fire that they believe was intentionally set in a boys’ bathroom at Bethlehem Central School High School.

The incident took place just before 11 a.m. on Tuesday. A fire alarm sounded after smoke was detected in the bathroom. Firefighters responded and the building was evacuated, according to a statement from Superintendent Jody Monroe.

No one was injured during the incident. Students and staff returned to the school at around 11:50 a.m. and the C wing of the building was reopened at around 1:30 p.m.

The investigation is ongoing.