Some congressional offices outside Washington and media organizations have received threatening letters containing a suspicious powdery substance that was tested and proved to be harmless, the FBI and the Senate’s top law enforcement officer said Wednesday.
Sergeant-at-Arms Terrance Gainer said in a memo to Senate offices that the letters were sent to three state and home district offices. A district office of House Speaker John Boehner, R-Ohio, received one of the letters, spokesman Kevin Smith said.
A federal law enforcement official, speaking on condition of anonymity, said that so far fewer than 10 members of Congress had received letters.
Letters were also sent to several media organizations. FBI spokesman Peter Donald said agents had responded to Viacom and at least one other location in New York. Preliminary tests showed that the powder did not pose a threat, he said.
“So far, none of the letters have contained a hazardous substance,” FBI Special Agent Jason Pack said. “We are working with those law enforcement agencies affected to determine if the mailings are related. We take these matters seriously and will investigate fully.”
The letters tell the recipients that there is a “10 percent chance you have just been exposed to a lethal pathogen.”
Even though none of the letters that have been tested have contained harmful substances, Gainer told staff to be extra vigilant.
“The author of these letters has indicated that additional letters containing a powdery substance will be arriving at more Senate offices and that some of these letters may contain an actual harmful material,” Gainer’s memo to Senate offices said. “Although all letters received thus far have proved harmless, it is essential that we treat every piece of suspicious mail as if it may, in fact, be harmful.”