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Harvard Medical School building reopens as police investigate explosion

The FBI and Boston police are actively pursuing two masked suspects after an intentional explosion at a major biomedical research facility with no injuries reported.

  • Around 3 a.m. Saturday, an explosion struck Harvard Medical School's Goldenson Building, and a Harvard University Police officer saw two masked suspects flee, captured on surveillance footage.
  • Investigators said the blast was set intentionally but have not released the device's design and motive remains unknown, while Harvard University faced prior threats and paid Harvard Hillel security costs earlier this year.
  • Boston Fire Department’s arson unit said the blast appeared deliberate, a full sweep found no secondary devices, and the fourth floor houses neurobiology research labs.
  • The FBI's Boston Field Office called the investigation active, and Longwood medical area campus security will tighten as cleaning crews work to restore normal function by Monday.
  • The Goldenson Building and its quad remained open Sunday with limited staff access, neighboring institutions continued business, and Boston Children's Hospital said patient care was not impacted despite a small police presence.
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Harvard Medical School building reopens as police investigate explosion

The investigation continues into a weekend explosion at Harvard Medical School that authorities say was an intentional act.

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‘Intentional’ explosion at Harvard Medical School building under investigation; police seek two suspects

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expaTimes broke the news in on Sunday, November 2, 2025.
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