All students and staff were brought around the corner to Tenafly High School while a Bergen County Sheriff's K9 unit swept the building following the 12:15 p.m. discovery.
Nothing suspicious was found, Capt. Michael deMoncada told Daily Voice.
The school was reopened at 1:45 p.m.
Although there were no suspects identified, deMoncada noted that an investigation was continuing.
He asked anyone with information that could help to call Tenafly PD: (201) 568-5100.
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