The FBI, the U.S. Postal Inspection Service, and state and local authorities are investigating more than 60 threatening letters that have been received by Financial Institutions in Araizona, Caliofornia, Colorado, Georgia, Illinois, New Jersey, New York, Ohio, Oklahoma, Texas, Virginia, and Washington, D.C. The letters began to be received on Monday, Oct. 20, 2008, and appear to all be originating from Texas - all have been postmarked in Amarillo, TX. Most of these letters contain a powder substance with a threatening communication. At this point, field and laboratory tests on the powder have been negative; however, additional testing is taking place.
To see a copy of one of the letters, visit http://www.fbi.gov/page2/oct08/threatletters_102308.html