BOSTON — The powder found in threatening letters received Wednesday by at least 11 Massachusetts police stations is not anthrax, state health officials said, dispelling fears of a new letter-borne ...

A white powder discovered on the dashboard of an unlocked car in Bethesda does not contain anthrax spores, and agents are investigating the case as a possible Halloween hoax, the FBI said yesterday.

Firefighters were not sure what the white powdery substance discovered at Roosevelt Elementary School this morning was, but they were not taking any chances. Crews suited up with rubber gloves and ...

For years, U.S. Army scientists in Utah have been developing a powdered form of anthrax that matches the strain used in the deadly letters that have killed five people since September, according to a ...