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Chatham Middle School was testing the district’s 911 alert system when it inadvertently sent a lockdown message to the Morris County 911 Communications Center and prompted an immediate police response around 1:45 p.m. on Friday, Sept. 23, the department said.
While the department confirmed that a lockdown had not been initiated by the school, a shelter-in-place command was ordered to allow police to do a “precautionary sweep” of the building, authorities said.
Once officers accounted for all the students and ensured that there was no emergency, the shelter-in-place order was lifted.
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