... So far, we've identified more than 50 letters, nearly all of which use threatening language identical to the text shown above. The letters have all been mailed from Texas and postmarked at Amarillo.

... Most of the letters contained some sort of powdery substance. All field tests to date have turned up negative--the powder appears harmless. Additional testing is taking place at regional laboratories.

... The letters have been sent to at least 11 states, including Arizona, California, Colorado, Georgia, Illinois, New Jersey, New York, Ohio, Oklahoma, Texas, and Virginia.

... The following three institutions have received letters:

Chase Bank;
The Federal Deposit Insurance Corporation, or FDIC, an independent federal agency; and
The U.S. Office of Thrift Supervision, which regulates all federal and many state thrift institutions.