Seven buildings at the University of Minnesota's Minneapolis campus were evacuated Wednesday after a professor found a note with a bomb threat against several campus buildings. Evacuations were ordered for Kohltoff, Smith, Fraser, Morrill and Johnston Halls, Walter Library and the Science Classroom Building, the university said. All classes and meetings in those buildings were canceled for the day. The threat came only days after a 23-year-old student shot 32 people to death and committed suicide Monday at Virginia Tech. On Tuesday, campus threats forced lock-downs and evacuations at universities, high schools and middle schools in at least 10 states. One threat in Louisiana directly mentioned the massacre in Virginia, while others were reports of suspicious activity in Texas, Arizona, Oklahoma, Tennessee, North Dakota, South Dakota and Michigan.