The news comes a week after a Derby man was arrested on charges that he sent letters threatening anthrax exposure to several state and federal offices.
Amir Omerovic, 27, is charged with sending letters to the governor's office, the Judicial Review Council and U.S. Coast Guard offices in Hartford, and to a U.S. Marine Corps office in Danbury.
The FBI said at the time that there was no evidence Omerovic had access to anthrax. The letters did not contain any white powders or other suspicious substance.