Harvard University officials have ordered an evacuation at four of its Cambridge campus sites Monday morning after explosives were sited on campus.
The school sent an alert on its Twitter page about 9:30 a.m. that read: "Alert: Unconfirmed reports of explosives at four sites on campus. Science Center, Thayer, Sever, and Emerson. Evacuate those buildings now."
Police are on the scene and investigating.
Cambridge police tweeted: "No reports of explosions. People should remain calm and check back for updates."
Campus and local police, including officers from nearby Boston Police Department, are searching the buildings.
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