FBI Boston’s Joint Terrorism Task Force and Harvard University police have arrested two Massachusetts men in connection with an explosion at Harvard Medical School , the FBI announced Tuesday.

Logan David Patterson, 18, of Bourne, Mass., and Dominick Frank Cardoza, 20, of Plymouth, Mass., were arrested early Tuesday morning and charged with conspiracy to damage by means of fire or an explosive, Leah Foley, the U.S. Attorney for the District of Massachusetts, said during a press conference.

According to Foley, at approximately 2:33 a.m. on Nov. 1, the two suspects were caught on surveillance cameras walking near the medical school and lighting what appeared to be Roman candle fireworks.

About 10 minutes later, the suspects were allegedly seen scaling scaffolding on the side of 220 Long

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