WASHINGTON (AP) -- FBI: Lab tests confirm presence of ricin in letters sent to US Sen. Wicker, President Obama.
OXFORD, Miss. (AP) -- The FBI has identified a Mississippi man suspected of mailing letters containing poisonous ricin as 45-year-old Paul Kevin Curtis.
FBI Special Agent in Charge Daniel McMullen said Curtis was arrested Wednesday afternoon at his apartment in Corinth, near the Tennessee state line about 100 miles east of Memphis.
Authorities still waited for definitive tests on the letters sent to President Barack Obama and Sen. Roger Wicker, R-Miss.
An FBI intelligence bulletin obtained by The Associated Press said those two letters were postmarked Memphis, Tenn.
The letter is undergoing further testing because preliminary field tests can be unreliable, creating false positives.
The letter was intercepted at a facility away from the White House. It comes the day after officials said a letter sent to Sen. Roger Wicker tested positive for poisonous ricin. That letter to Wicker, a Republican, was intercepted at a Senate mail facility just outside Washington.
The FBI says there is no indication of a connection to the bombing at Monday's Boston Marathon.