The FBI announced it arrested two men who used a Roman candle firework inside a Harvard Medical School lab, causing an explosion on Saturday.

Two Massachusetts men visiting Boston-area colleges on Halloween night when numerous parties were underway have been arrested and charged with causing an explosion at Harvard Medical School's campus, ...

Ted Docks, head of the FBI's Boston division, said no one was hurt and property damage was limited, but he noted that "setting off an explosive device inside a locker at an institution geared toward h...