Updated

Ball State University has issued an all-clear after police searched several campus buildings following reports that an armed person might be on the central Indiana campus.

The university sent an all-clear notice about 7:50 p.m. EST Friday, some three hours after issuing an alert reporting a "possible armed assailant" near the Muncie campus' Student Recreation and Wellness Center. The all-clear notice said the campus was secure.

Ball State spokesman Tony Proudfoot says multiple witnesses had reported hearing someone repeatedly shout "gun!" on the Recreation and Wellness Building's third-floor running track. But he said no weapon was found on the campus about 60 miles northeast of Indianapolis.

The campus was partially locked down as police and state troopers swept through the recreation building and four adjoining buildings.