FBI: No arrests in case of Spokane ricin letter

FBI: No arrests in case of Spokane ricin letter
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 it still has not made any arrests after searching a downtown Spokane apartment as part of an investigation into the discovery of a pair of letters containing the deadly poison ricin.

The letters were postmarked last Tuesday in Spokane and addressed to the downtown post office and the adjacent federal building.

Few details have been released, but investigators in hazmat suits spent from 7 a.m. to 10:30 p.m. Saturday executing a search warrant at a three-story apartment building. Authorities said there was no public health risk.

Agency spokeswoman Ayn Sandalo Dietrich said Sunday investigators appreciated the patience of the building's residents and neighbors.

The Spokane investigation comes a month after letters containing ricin were addressed to President Barack Obama, a U.S. senator and a Mississippi judge. A Mississippi man has been arrested in that case.