DALLAS (AP) -- Federal agents have made an arrest in the mailings of suspicious powder to banks and federal offices around the country.
The U.S. attorney's office in Dallas says Acting U.S. Attorney James T. Jacks will announce the arrest Tuesday.
The FBI has said threatening letters bearing Amarillo, Texas, postmarks were sent in October to banks and financial institutions.
The letters said "It's payback time" and promised death within 10 days, the FBI said.
More than 50 letters were mailed to Chase Bank branches and federal regulatory offices in Denver and 11 other cities within a week. Most of the letters were in envelopes containing white powder, which so far has tested negative for any dangerous toxins.
(Copyright ©2009 by The Associated Press. All Rights Reserved.)
