Harvard buildings evacuated after reports of explosives

Four buildings at Harvard University in Massachusetts have been evacuated after unconfirmed reports of explosives on the campus.

Emergency scene outside four evacuated @Harvard buildings due to unconfirmed report of explosives. #Cambridge pic.twitter.com/YZekfQAQPJ

— newsbell (@newsbell) December 16, 2013

Students and staff have been asked to evacuate the four buildings, which are all around the centre of the campus.

Alert: Unconfirmed reports of explosives at four sites on campus: Science Center, Thayer, Sever, and Emerson. Evacuate those buildings now.

— Harvard University (@Harvard) December 16, 2013

Update: HUPD/Cambridge Police on scene. Unconfirmed report that explosives may have been placed in 4 campus buildings http://t.co/dr5PFJr2Is

— Harvard University (@Harvard) December 16, 2013

Update: The investigation is ongoing. Access to Harvard Yard has been restricted to Yard residents with Harvard IDs. http://t.co/Q0xgAapFdu

— Harvard University (@Harvard) December 16, 2013

There are no reports of any injuries.

The university issued a statement saying: "The Harvard University Police Department this morning received an unconfirmed report that explosives may have been placed in four buildings on campus: the Science Center, Thayer, Sever and Emerson Halls."

It went on to state that "an abundance of caution" prompted the evacuations.

Police from five different agencies are on campus. (Jessica Rinaldi for The Boston Globe) http://t.co/JXva8LHjIU pic.twitter.com/GvoaXNcuSc

— The Boston Globe (@BostonGlobe) December 16, 2013