After school police searched for about an hour, the campus was declared safe. Nothing was found, Leuenhagen said.
School police worked with staff to escort the students out of the building, and buses were diverted to Sac-N-Sav.
Parents were alerted to the emergency, Leuenhagen said, and then told via email that the campus will be safe for students to return Tuesday. After-school activities Monday were canceled.
Police will be investigating phone records to find out who called the threat into the school's office.