A threat was also reported at Dunster Street and Mt. Auburn Street.
—Staff writers Nicholas P. Fandos and Samuel Y. Weinstock contributed to the reporting of this story.
—Staff writer Elizabeth S. Auritt can be reached at eauritt@college.harvard.edu. Follow her on Twitter @eauritt.
This article has been revised to reflect the following correction:
CORRECTION: April 15, 2013
An earlier version of the teaser accompanying this article incorrectly stated that Harvard officials closed the Kennedy School and canceled all Faculty of Arts and Sciences and Harvard Extension School classes in response to unconfirmed bomb threats throughout Cambridge. In fact, the Kennedy School was closed due to an explosion at the John F. Kennedy Presidential Library in Boston, and the Extension School was closed because of transportation issues, according to a University official.