Hoax bomb threat prompts evacuation of several buildings at Harvard

CAMBRIDGE, Mass. Authorities are searching for suspects whose hoax calls triggered the evacuation of several buildings at Harvard University and a futile search for an armed man and bombs on campus.

Cambridge police spokesman Jeremy Warnick says police received four calls reporting bombs planted on campus and a man carrying an assault rifle at the Ivy League school on Saturday morning.

Harvard University's police department says in a community advisory that it immediately ordered evacuation of buildings identified by the caller. The agency also notified colleagues at the Cambridge police and fire department, and their joint search of the locations failed to yield bombs or an armed man.

Warnick says police will work with FBI agents to identify two people who claimed responsibility on Twitter.

Additional information was not immediately available.