Alert: HUPD and CPD are on the scene and investigating. Stand by for more info. View emergency page for updates http://t.co/VAZ1odRYB9— Harvard University (@Harvard) December 16, 2013
The White House released a statement encouraging the public to follow local officials' directions, according to MSNBC's Thomas Roberts.
"The White House will remain in touch with our federal, state and local partners and the President will continue to receive briefings as needed," the statement read, according to MSNBC. "In the last hour it was reported that the ATF [Bureau of Alcohol, Tobacco, Firearms and Explosives] was on scene as well as the Massachusetts State Police."
As of 10:40 a.m. ET, an emergency alert on Harvard's website said "HUPD has no reason to believe there is a threat to any other site on campus." The investigation was still ongoing.
Correction: Investigation into the Harvard bomb threat is still ongoing. All-clear has not been given.— CBS Evening News (@CBSEveningNews) December 16, 2013
This post has been updated.
Late Update: As of 2:44 p.m. ET, the university said all four buildings were cleared.