* Preliminary result sent for further analysis
* Letter was sent to Senator Wicker but intercepted
* Senators reminded of 2001 anthrax attacks
* Several U.S. agencies investigating
(Updates with new statement from police)
By Patricia Zengerle
WASHINGTON, April 16 U.S. authorities on Tuesday
intercepted a letter sent to Mississippi Senator Roger Wicker
that preliminary tests showed contained the deadly poison ricin,
and the Capitol police, FBI and other agencies have launched an
The letter has been sent for further analysis to an
accredited laboratory, Capitol police said Tuesday night.
It was postmarked from Memphis, Tennessee, and had no return
address, Terrance Gainer, the Senate sergeant at arms, said
earlier in a warning to members of the Senate.
Gainer first said in a statement that the substance had
tested positive for ricin, which is found naturally in castor
beans and can cause death from exposure to as little as a
pinhead amount, usually within the first 72 hours.
Police later issued a statement saying the test was
"preliminary" and "indicated" that ricin had been found in the
It was intercepted in a mail handling facility and
quarantined, the statement said.
"Senate employees should be vigilant in their mail handling
processes for ALL mailings," Gainer said in his written
Members of the Senate were briefed on the incident by Gainer
during a meeting with FBI Director Robert Mueller and Janet
Napolitano, the secretary of Homeland Security, on Tuesday on
the bombings in Boston.
Several senators told reporters after the briefing that the
incident reminded them of the anthrax attacks in the wake of the
Sept. 11, 2001, attacks on the Pentagon and World Trade Center.
The ricin test came one day after the explosions at the
Boston Marathon that killed three people and injured 176.
"I don't know if it's a coincidence. It's too early to tell.
We don't know enough about Boston," said Senator Richard Durbin,
the No. 2 Democrat in the Senate.
Senate Majority Leader Harry Reid said he had been told the
letter was addressed to Wicker, a Republican senator from
All mail to the U.S. Senate had been stopped, and post
offices at the Capitol had been closed as a precaution, the
senators said. They were getting in touch with their state
offices, where mail is not subject to the same extensive
screening, to ensure that precautions were being put in place.
Many senators expressed concern about their staffs and the
risks to postal workers.
They said they were aware of only one letter that had been
intercepted that tested positive for ricin.
A law enforcement source, speaking on condition of
anonymity, said initial field tests on the letter produced mixed
results, prompting authorities to order further analysis at an
It was not immediately clear whether Wicker, a Republican,
had attended the briefing by Mueller and Napolitano that was
open to all senators from both parties.
Wicker issued a statement saying only that the matter was
being investigated and expressing gratitude for thoughts and
prayers on his behalf.
"This matter is part of an ongoing investigation by the
United States Capitol Police and FBI. I want to thank our law
enforcement officials for their hard work and diligence in
keeping those of us who work in the Capitol complex safe," he
said in the statement.
PREVENTION SYSTEM WORKED
Wicker, a former member of the House of Representatives, has
been a member of the Senate since he was first appointed to a
vacant seat in December 2007. He won a special election to serve
the remainder of that term, and was re-elected in November 2012
to a full six-year term.
Several senators noted that the system of mail screening,
begun after the anthrax attacks, had worked.
"The bottom line is the process we have in place worked,"
said Claire McCaskill, a Democratic senator from Missouri. She
said a suspect had been identified, and said it was someone who
wrote to senators often.
Other officials could not immediately confirm that report.
There was another ricin scare at the U.S. Capitol in 2004,
when tests identified a letter in a Senate mail room that served
the office of Bill Frist, a Tennessee Republican who was then
the Senate Majority Leader.
The most famous case of ricin poisoning was in 1978 when
dissident Bulgarian writer Georgi Markov was killed after a
passerby in London jabbed him with an umbrella that injected a
tiny ricin-filled pellet.
In 2001, the Capitol was one target in a series of anthrax
attacks that killed at least five people on the East Coast,
including two Washington postal workers.
Letters containing anthrax spores were mailed to the
Washington offices of two senators and to news media outlets in
New York and Florida.
(Additional reporting by Rachelle Younglai, David Lawder,
Patrick Temple-West and Tabassum Zakaria; Editing by Cynthia
Osterman, Philip Barbara, Fred Barbash and Paul Simao)