'Intentional' explosion at Harvard medical campus under investigation

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Police are investigating an “intentional” explosion at a Harvard University medical building early Saturday morning.

A fire alarm at the Goldenson Building, part of Harvard’s medical campus in Boston, went off at 2:48 a.m. A Harvard University Police Department officer who responded to the call saw two “unidentified individuals fleeing from the building,” Harvard police said in a statement.

Image: Harvard University is seeking the identities of two people in connection with the "intentional" explosion incident on Saturday, Nov. 1, 2025.Harvard is seeking the identities of two people in connection with the explosion incident.Harvard University Police Department

The explosion occurred on the fourth floor the building.

No injuries were reported in the incident.

The explosion “appeared to be intentional,” according to an initial assessment by the Boston Fire Department’s arson unit.

The Boston Police Department also responded and conducted a sweep of the building for any additional devices, but none were found.

Image: Harvard University is seeking the identities of two people in connection with the "intentional" explosion incident on Saturday, Nov. 1, 2025.Harvard is seeking the identities of two people in connection with the explosion incident.Harvard University Police Department

The university released photos on Saturday evening of two individuals captured on CCTV footage. One was depicted wearing a balaclava, and the other wearing a hoodie with the hood raised and a face covering.

The university asked for the public’s help in identifying the individuals.

The explosion is under investigation by the Harvard University Police Department along with local, state and federal law enforcement partners.

The FBI is at the scene aiding in the investigation.