ANN ARBOR (WWJ) - Police at the University of Michigan say there is no apparent threat following reports of an active shooter on campus.

Campus police issued an emergency alert around 4:35 p.m. Saturday, warning those at the Mason Hall to "Run Hide Fight" after they received reports about a potential shooter. The department later updated the alert to say the reports were unconfirmed but officers were still checking the area.

At 5:32, the alert was updated again to say there was no apparent active threat. Those nearby were still asked to avoid the area as an investigation continues.

Police confirm an active shooter was never on campus. The reports of a shooting were apparently a false alarm triggered by a group of people who were loudly popping balloons at the hall. Others heard the commotion and started running, assuming the popping noises were gunshots.

Unconfirmed reports say several people were injured while trying to flee the area.

UM ALERT UPDATE There does not appear to be an active threat to the community. DPSS continues to investigate. Continue to stay clear of area. — U-M DPSS (@umichdpss) March 16, 2019

#BREAKING Police are responding to reports of an active shooter at the University of Michigan. pic.twitter.com/WZxhIjxTdD — News This Second (@NewsThisSecond) March 16, 2019

NOW: The University of Michigan Ann Arbor. Reports of an active shooter. pic.twitter.com/yMq9PCM5gI - @darciegmoran — Shawn McKenzie ---- (@SMcK17) March 16, 2019

Never seen a police response like this at the University of Michigan. Hope everything is ok, lots of concerned students. pic.twitter.com/cOL6tygEvS — Owen Tien (@OJTien) March 16, 2019

A photo sent to The Daily from a student in a university library: pic.twitter.com/oTgnPdvouw — The Michigan Daily (@michigandaily) March 16, 2019

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