WASHINGTON (10/23/08)--The Federal Bureau of Investigation (FBI), the U.S. Postal Inspection Service and state and local authorities are investigating more than 30 threatening letters received at financial institutions in ten states and the District of Columbia. In addition to a threatening message, most of the letters also contain a powder substance, according to a statement from the FBI. Field and laboratory tests on the powder so far have been negative, said the agency. Financial institutions in New York, New Jersey, Washington, District of Columbia, Ohio, Illinois, Colorado, Oklahoma, Georgia, California and Texas have reported receiving the letters. “Should your any part of your institution--corporate offices, branches--receive one of theses letters, please contact your local FBI office and ask for the WMD Coordinator,” said the FBI. Use the resource link for more information.