Two Massachusetts men arrested in Harvard Medical School explosion; no injuries, motive unknown.

Two Massachusetts men have been arrested in connection with an explosion at Harvard Medical School in Boston, the FBI confirmed. The incident occurred at an empty building on campus over the weekend, with authorities stating the suspects were wearing masks during their arrest. The explosion’s exact cause and motive remain under investigation, and no injuries have been reported. Federal and local agencies are collaborating on the probe, reviewing surveillance and other evidence. Harvard University activated emergency protocols but confirmed the campus remains open with increased security. The suspects’ identities have not been released.