Several buildings at Harvard University as well as much of Harvard Yard have been evacuated following an e-mail threat of a bomb on campus.
Two other colleges here in Massachusetts - Cape Cod Community College and Fitchburg State College - were also evacuated following bomb threats.
Chances are it is a hoax. Bomb threats at schools aren't that uncommon. I remember one when I attended high school in Thunder Bay, Ontario. There will always be people who cause mischief. But given the Paris bombings, nobody is taking any chances.