ESCANABA — Escanaba Area Public Schools locked down Friday as a precaution after office staff at the Junior/Senior High School received a threatening phone call.

According to a letter written by Superintendent Coby Fletcher and posted on Facebook, Escanaba Public Safety was immediately notified of the call and all of the schools in the district were placed on an external lockdown.

Officers identified and made contact with the caller, a 31-year-old Escanaba man, and quickly determined the schools could resume normal operations. The man was arrested and lodged in the Delta County Correctional Facility, according to Escanaba Public Safety.

“The safety of our students is our foremost concern, and we appreciate the patience and understanding of our parents as we follow established procedures designed to keep our facilities secure and our children safe. We are also grateful for the rapid intervention of our Public Safety officers,” wrote Fletcher.

Bond for the subject was set at $250,000. His name has not been released, pending his arraignment.