ANN ARBOR, Mich. (WTVG) - UPDATE: The University of Michigan's Department of Public Safety and Security (DPSS) reports there is no active threat to the campus community.
The University of Michigan issued the all clear after investigating reports of an active shooter on the Ann Arbor campus.
Around 5:35 p.m., DPPS reported there was "no appearance of an active threat" after a reported active shooter happened about 4:30 p.m.
The Washtenaw County Sheriff's Office reports girls popping balloons appeared to have caused the active shooter report.
Deputies say the women were conducting a vigil for the victims in Friday's shootings in New Zealand shootings.
Several balloons were popped near Mason Hall on State Street which may have scared several in the crowd.
Campus police are investigating.
For a time, police searched Mason Hall looking for a shooter.
At one point, the University tweeted an emergency alert then confirmed there was an active shooter inside Mason Hall.
But in about an hour, determined there was no appearance of an active threat.