WASHINGTON - Law enforcement officials say a second letter sent to the U.S. Senate has been intercepted and is being tested for poisonous ricin.
Two officials told The Associated Press on Wednesday that the letter was being treated in the same manner as a separate one sent to Mississippi Sen. Roger Wicker and was undergoing field tests.
The officials spoke on the condition of anonymity because the investigation is ongoing.
The letter to Wicker, a Republican, was intercepted at a Senate mail facility just outside Washington and has tested positive for ricin.
Sen. Claire McCaskill has said authorities have a suspect in mind in that case, though no one has been charged.
It was not immediately clear which senator the second letter was addressed to.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
Click on the region names in the map below to see news from that region.
Things To Do
INSIDE: View our list of events happening this week around the Valley.
RIGHT NOW: Top Stories
The former Phoenix officer faced charges of second-degree murder and animal cruelty after he fatally shot a man and his dog during an October 2010 domestic violence call.
Officials are investigating a murder-suicide in Phoenix.
A construction worker arrested in the killing of a 14-year-old Mesa girl who was assaulted, strangled and dumped in a trash container is being held without bond.
Canadian airline WestJet surprised passengers with gifts from their Christmas wish list at the end of their flight.
Nearly 365,000 people have signed up for Obamacare in its first two months, but that's still a far cry from the 7 million projected to ultimately enroll for 2014.
Plan for warmer temperatures today and in to the weekend. Find out just how warm we will get this weekend.