Naperville Central received a phone call from an anonymous caller threatening the safety of staff and students in the morning of Jan. 31. Administrators determined no evacuation was necessary after “consulting with the Naperville Police Department, local, state and federal agencies,” Principal Jackie Thornton wrote in an email sent out to parents and students. 

The caller indicated a specific time the threat would take place, yet the specified time had already passed by the time Central administration received the call, Thornton said.

Thornton made an announcement notifying staff and students of the situation at the beginning of third period on Jan. 31.