SPOKANE, Wash. (AP) - The FBI and other law enforcement agencies are executing a search warrant in the case of two letters containing the deadly poison ricin that were intercepted this week at a post office in Washington state.
Police say the investigation has focused Saturday morning on a neighborhood near downtown Spokane.
The FBI, U.S. Postal Inspection Service and Spokane police are involved.
Other details are not immediately available.
Ricin is a deadly poison made from castor beans. Two letters containing the substance were intercepted at the downtown Spokane post office on Tuesday. There were no injuries.
Copyright 2015 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.