The FBI arrested a Mississippi man yesterday in connection with letters sent to President Barack Obama and two other officials that are believed to have contained the deadly poison ricin, the US Justice Department said.
Paul Kevin Curtis was arrested at his home in Corinth, Mississippi, and is "believed to be responsible for the mailings of the three letters sent through the US Postal Inspection Service which contained a granular substance that preliminarily tested positive for ricin", the justice department said in a statement.
The letters were addressed to a US senator, the White House and a Mississippi justice official, the statement said.
The ricin poison scare hit Washington after bombings at the Boston Marathon killed three people and injured 176 on Monday, but the FBI said there was no indication the incidents were connected.
The FBI said the envelope sent to Mr Obama was received at a mail-screening facility outside the White House and was immediately quarantined. Preliminary tests showed it contained the deadly poison ricin, the FBI said.
Washington was put on edge on Tuesday evening when news emerged that authorities had intercepted a letter sent to Republican Senator Roger Wicker of Mississippi that had initially tested positive for ricin.
Following the arrest, Mr Wicker issued a statement thanking the FBI and Capitol Police "for their professionalism and decisive action in keeping our family and staff safe from harm".
False alarms
Earlier yesterday, a flurry of reports of suspicious letters and packages rattled the US capital and caused the temporary evacuation of parts of two Senate buildings. Most of the reports quickly proved to be false alarms, and business was only temporarily disrupted on Capitol Hill.
The letters to Mr Obama and Mr Wicker had identical language, included the phrase, "To see a wrong and not expose it, is to become a silent partner to its continuance." They were signed, "I am KC and I approve this message," according to an FBI operations bulletin reviewed by Reuters.
Two law enforcement sources said investigators believed the man arrested was the same person as Kevin Curtis, who they say has posted rants on the internet and performed as an entertainer and Elvis Presley impersonator.
In an online comment on an Elvis blog post in 2007, a Kevin Curtis complained that several Elvis contests in several states "were rigged with hosts and judges getting kick-backs". The signature was: "This is Kevin Curtis and I approve this message."
Northern District Mississippi Public Service Commissioner Brandon Presley, who said he was related to Elvis Presley, told Reuters that Curtis contacted him via Facebook late on Sunday asking him whether he was a relative of the late rock singer.
Mr Presley said he did not know Curtis. "I don't know if he's fixated on Elvis or Elvis' family or what," he said. "We've been told by the authorities to be very cautious with our mail for the next few days."
Public records show a Paul Kevin Curtis lived until recently in Booneville, Mississippi. Randy Tolar, a sheriff in Prentiss County, where Booneville is located, said he knew a Paul Kevin Curtis who had been jailed at least four times in recent years, all on misdemeanour charges, including telephone harrassment and stalking.
The envelopes believed to contain ricin both bore postmarks from Memphis, Tennessee, and were dated April 8th. Memphis mayor AC Wharton noted in a statement, however, that it did not mean the letters originated in that city.
Unsettling reminder
For Washingtonians, the situation was an unsettling reminder of events of nearly 12 years ago when letters containing anthrax spores were mailed to the Washington offices of two senators and to media outlets in New York and Florida, not long after the September 11th, 2001, attacks in New York and Washington.
The FBI said White House operations were not affected by the latest scare. It noted that filters at a second government mail-screening facility had preliminarily tested positive for ricin this morning and mail from that facility was also being tested.
Ricin is a lethal poison found naturally in castor beans, but it takes a deliberate act to convert it into a biological weapon. Ricin can cause death within 36 to 72 hours from exposure to an amount as small as a pinhead. No known antidote exists.
There was another ricin scare at the US Capitol in 2004, when tests showed positive on a letter in a Senate mail room that served the office of Bill Frist, a Tennessee Republican who was then Senate majority leader.
Law enforcement authorities yesterday closed and then reopened parts of the Hart and Russell Senate buildings near the Capitol after tests on suspect items showed there was no threat.
"All test results were negative," U.S. Capitol Police said over the public address system in Senate office buildings.
Police questioned a man with a backpack who had been delivering envelopes to Senate offices, a law enforcement official said. This delivery method broke the normal protocol, because no mail is supposed to be delivered without first being checked at an outside facility, Capitol officials said.
In Arizona, the bureau of Alcohol, Tobacco, Firearms and Explosives said two suspicious letters had been sent to Republican Senator Jeff Flake's Phoenix office. Two staffers and a police officer were taken to the hospital as a precautionary measure after reporting irritation when handling them.
Mr Flake later issued a statement saying no dangerous materials were detected in the mailings. One of them originated in Tennessee, Mr Flake told reporters outside the Senate.
Reuters