Crimson staff writer
Rebecca F. Elliott
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Empty Plaza
Harvard University Police Department officers congregate outside the Science Center, one of the four sites evacuated after HUPD received unconfirmed reports of explosives earlier this morning.
Hazardous Materials Vehicle
A hazardous materials vehicle from the Cambridge Fire Dept. sits in front of Loeb House on Quincy St. outside of Harvard Yard, near several of the evacuated buildings.
Cambridge Fire Department
Authorities line Quincy St. behind Sever and Emerson halls, two of the buildings evacuated after HUPD received unconfirmed reports of explosives Monday morning.
Standing Guard
A lone police officer stands guard outside of Emerson Hall, one of the four buildings evacuated Monday morning.
Gallery: Authorities Descend on Harvard Yard Amid Reports of Explosives
Harvard University Police Department, Cambridge Police Department, and the Cambridge Fire Department joined state and federal authorities in a sweep of campus buildings Monday morning after HUPD received unconfirmed reports of explosives on campus.