Ohio State University has evacuated four buildings, including the main library, because of bomb threats e-mailed to the FBI.
An FBI spokesman says the threat was sent to the bureau's Washington headquarters Tuesday morning.
Campus police say they were alerted shortly before 8:30 that the threats involved the William Oxley Thompson memorial library and three laboratory buildings.
All have since been evacuated.
Students and faculty have been warned to stay out of the area.
We'll bring you more details as they become available to us.