HUNTERSVILLE, N.C. - Huntersville firefighters were called to Duke Energy's McGuire Nuclear Station siren location on Ervine Cook Road Wednesday when a siren sounded off.
Charlotte-Mecklenburg Emergency Management sent out an alert saying it was a false alarm.
On May 8, a malfunction also caused the siren to go off.
Duke Energy officials said the system that controls the siren wasn't working properly.
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