The FBI was one of a few agencies that investigated the explosion.

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Two Massachusetts men have been charged with allegedly trying to damage a Harvard Medical School neuroscience building with what was likely a firework on Halloween night.

Logan David Patterson, 18, and Dominick Frank Cardoza, 20, are charged with “conspiracy to damage, by means of fire or an explosive, a building owned or possessed by, or leased to, an institution or organization receiving Federal financial assistance, and used in interstate commerce.” It’s unclear whether they have lawyers.

An FBI special agent wrote in an affidavit that security cameras captured two masked men “lighting what appear to be roman candle fireworks at approximately 2:24 a.m.” Saturday. Abo

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