Explosion at Harvard Medical School appears intentional; no injuries reported

An explosion early Saturday at Harvard Medical School appears to have been intentional, though no one was injured, authorities said. The blast was reported in the pre-dawn hours of November 1, 2025, at the Goldenson Building on the school’s Boston campus. A university police officer who responded to a fire alarm tried to stop two unidentified people who ran from the Goldenson Building before reaching the area where the alert had been triggered.

The two individuals were later described in security photos as wearing face coverings and what looked like sweatshirts. In the hours that followed, the Boston Fire Department determined that the explosion was intentional, and officers conducted a sweep of the building, finding no additional devices. No injuries were reported, and officials confirmed that no one was hurt by the blast. Police released grainy photos of the two people wearing face coverings and sweatshirts to aid identification and capture of those involved.

The sequence of events, as outlined by authorities, includes the officer’s attempt to intercept the suspects as they fled the building, followed by the investigation and a building sweep that did not uncover further threats. The release of the photos underscores the ongoing effort to identify and locate those who were near the scene at the time of the blast.

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