. . .found in 8 federal buildings in the northwest yesterday:

Suspicious envelopes containing white powder were discovered at eight federal buildings in Idaho, Utah and Washington state on Monday, according to FBI officials.
The FBI is investigating whether the envelopes are linked.
“Certainly logic would dictate that there is some connection,” said FBI Special Agent Debbie Dujanovic Bertram, spokeswoman for FBI offices in Salt Lake City.
No injuries were reported and initial field tests on the envelopes came back negative. Samples sent to FBI labs await further testing, Dujanovic Bertram said.
Four letters were found in Idaho, at the U.S. Attorney’s office in Coeur d’Alene and Boise and FBI offices in Coeur d’Alene and Pocatello. The Salt Lake City FBI office also discovered an envelope, Dujanovic Bertram said.
In Washington, officials discovered envelopes at a federal building in Seattle, an Internal Revenue Service office in Bellevue and the FBI office in Spokane, according to local news reports.
An IRS worker who opened an envelope with the white substance was taken to a local hospital as a precaution.