Authorities in hazardous materials suits searched a downtown Spokane, Washington apartment on Saturday while investigating the recent discovery of a pair of letters containing the deadly poison ricin.
Few details have been released in the case, and no arrests have been made. Federal investigators have been searching for the person who sent the letters, which were postmarked on Tuesday in Spokane.
The letters were addressed to the downtown post office and the adjacent federal building, but authorities have not released a potential motive. They also have not said whether the letters targeted anyone in particular.