UPDATE from the Associated Press:
OLYMPIA, Wash. (AP) – Officials at the Washington state Capitol say that a letter that arrived at a Capitol office building didn’t contain powder, as they initially believed, but tea.
Bob Calkins, a spokesman for the Washington State Patrol, says that while they’ll still continue to investigate that the contents of the white teabag is actually tea, at this point “our level of concern has dropped.”
The letter was being held in the security office at John Cherberg Building, which houses Senate offices. Calkins said he did not yet have information on who the letter was addressed to.