FBI: 5th Spokane letter discovered in ricin case

FBI: 5th Spokane letter discovered in ricin case
During the execution of a search warrant, members of the Joint Federal Haz-Mat Team, FBI, and local law enforcement gather in front of the Osmun Apartments near the intersection of First Avenue and Oak Street in Browne's Addition on Saturday, May 18, 2013 in Spokane, Wash. (AP Photo/TheSpokesman-Review, Colin Mulvany)
SPOKANE, Wash. (AP) — The FBI says investigators have located a fifth letter sent from Spokane in connection with a ricin investigation.

Frank Harrill, the supervisory senior resident agent of the FBI in Spokane, said in an email that workers at a post office in the city discovered the letter Saturday after it was returned as undeliverable. It had been addressed to the Central Intelligence Agency.

Harrill said the letter is similar in appearance to four other letters sent from Spokane last month that contained the deadly poison. Those were addressed to President Barack Obama, a federal judge, a Spokane post office and the nearby Fairchild Air Force Base.

No one has been sickened. The newly discovered letter was being sent for further testing.

A Spokane man named Matthew Ryan Buquet faces a one-count grand jury indictment for mailing threatening communications in connection with the case.