Security is being tightened at Illinois State University after authorities say they found a bomb threat written in a bathroom.
Officials said Tuesday that the threatening message was scrawled on a handwritten note inside Schroeder Hall.
Classes aren't being canceled, but administrators say they'll increasing security for the next several days while law enforcement officials investigate the threat. They're limiting access to the building, checking bags and using special-trained dogs that will sniff for explosives.
ISU Police Chief Jay Groves says the school contacted the FBI as a precaution.
Classes at the Normal school began Monday.