The Harvard University Police Department is investigating what they're calling an intentional explosion inside a building on the medical campus early Saturday morning.

Police say the explosion occurred around 2:48 a.m. on the fourth floor of the Goldenson Building at 220 Longwood Avenue.

There were no reports of any injuries.

A responding officer saw two people fleeing the scene and tried stopping them, but was unsuccessful, according to police.

Harvard University via AP This photo provided by the Harvard University Police Department shows a person of interest in an explosion at the Harvard Medical School in Boston, on Saturday, Nov. 1, 2025.

A Harvard University spokesperson released these photos of the two individuals caught on surveillance cameras.

Investigators from the Boston

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