J. Scott Applewhite, ap
WASHINGTON — An envelope addressed to Sen. Roger Wicker of Mississippi twice tested positive Tuesday for ricin, a potentially fatal poison, congressional officials said, heightening concerns about terrorism a day after a bombing killed three and left more than 170 injured at the Boston Marathon.
One senator, Claire McCaskill of Missouri, said authorities have a suspect in the fast-moving ricin case, but she did not say if an arrest had been made. She added the letter was from an individual who frequently writes lawmakers.
On Tuesday night, FBI spokesman Paul Bresson said initial field tests on the substance produced mixed results and that it is in the process of undergoing further analysis at an accredited laboratory. Only after that testing can a determination be made about whether the substance is ricin, Bresson said.
Late Tuesday, Wicker released a statement acknowledging the letter and said it was sent to his Washington office.
"This matter is part of an ongoing investigation by the United States Capitol Police and FBI," Wicker said. "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."
Terrance W. Gainer, the Senate sergeant-at-arms, said in an emailed message to Senate offices that the envelope to Wicker, a Republican, had no obviously suspicious outside markings and lacked a return address. It bore a postmark from Memphis, Tenn. Gainer said there was "no indication that there are other suspect mailings."
Wicker, 61, was appointed to the Senate in 2007 and won election to a full term two years ago. He previously served a dozen years in the House.
- International tax competitiveness report: See...
- Jailed, some mentally ill inmates land in...
- Islamic State group calls for attacking...
- 'The Lion King' earns record box office
- Prosecutor: 800 rounds found in White House...
- Why a parent going to prison can be worse...
- 11 best—and worst—state tax systems
- Apple sells more than 10 million iPhones in...
- Yellen says US families need to boost... 10
- Security breached: Intruder gets into... 9
- Thousands march in NYC, around globe... 9
- Jailed, some mentally ill inmates land... 9
- How much America wants to be taxed 9
- Iranian youth behind 'Happy' video... 8
- Islamic State group calls for attacking... 7
- It's not just young people —... 7