The Brief

Reports of an active shooter on the campus of Villanova University on Thursday afternoon turned out to be unfounded.

A massive law enforcement response, including 18 EMS units, swarmed the scene after a 911 call reported a man armed with an AR-15-style weapon.

The County of Delaware's Department of Emergency Services is now investigating the source of the erroneous calls.

VILLANOVA, Pa. - Villanova University was the center of a major response effort after false 911 reports of an active shooter on campus. Delaware County officials gave an update Friday morning with more details on how the events of the "cruel hoax" unfolded.

What we know:

Delaware County's Department of Emergency Services reportedly received a call at 4:33 p.m. about a man with an AR-15-style weapon on

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