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.
Click here to follow Daily Voice Northern Highlands and receive free news updates.