Authorities are investigating an apparent intentional explosion that occurred early Saturday morning inside a building on Harvard University’s Longwood Medical School campus in Boston.
According to Harvard officials, just after 2:45 a.m., a Harvard University Police Department (HUPD) officer was dispatched to the Goldenson building at 220 Longwood Avenue following a fire alarm activation. Upon arrival, the officer observed two individuals fleeing the building.
The officer attempted to stop the pair before proceeding to the fourth floor, where the alarm originated. There, the officer discovered evidence of an explosion.
The Boston Fire Department’s Arson Unit later assessed that the blast appeared to be deliberate. The Boston Police Department conducted a sweep of the premises and found no additional explosive devices.
No injuries have been reported.
“The Harvard University Police Department is actively investigating this incident in coordination with local, state, and federal law enforcement partners,” a university spokesperson said.

The FBI’s Boston Field Office confirmed that agents were assisting HUPD at the scene but referred all further inquiries to university police.
Officials have not yet disclosed the cause of the explosion.
Anyone with information related to the incident is urged to contact the Harvard University Police Department’s Detective Bureau at 617-495-1796.
HUPD has not yet responded to additional questions.