Authorities say they found bomb-making materials, and plants that could be made into poisons and flight training papers at a home in eastern North Carolina.
Multiple media outlets reported Currituck County deputies called the FBI to investigate after arresting two brothers in a home they rented near Shawboro.
The brothers' landlord called police after noticing the men were growing plants in the attic of their home.
Deputies say 34-year-old Daniel Robinson II is charged with possession of weapons of mass destruction and poisonous plants that could be used for bomb making. No federal charges have been filed.
Robinson and his brother, 32-year-old Timothy Robinson, are both charged with possession and manufacture of marijuana.