10:15am: Naperville North High School has been closed for the day while the Naperville Police Department continue to investigate an emailed bomb threat against the building. We will update when we know more. Naperville North Investigates Bomb Threat, Delays Start of School Day; Update: School Closed For Today Naperville North High School has delayed the … Continue reading Naperville North Investigates Bomb Threat, Delays Start of School Day; Update: School Closed For Today