North Little Rock emergency sirens went off accidentally about 9:30 a.m. this morning and were heard in Little Rock as well before the three-minute cycle could be completely shut down.

A spokesman said the cause wasn’t clear. The dispatch center where sirens are triggered had a short staff at the time and was handling multiple police and fire calls, which could have loosed a radio frequency that triggers the system, but that’s only conjecture at this point.

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Meanwhile, stand down.