A man was arrested and charged on Friday in connection with about 100 envelopes containing threatening letters and a suspicious powdery substance mailed from Oregon to members of Congress and the news media, authorities said.
A federal grand jury returned a two-count indictment charging Christopher Lee Carlson, 39, of the Portland area, with one count of mailing a threatening communication to a member of Congress and one count of mailing a letter threatening to use a biological weapon to a U.S. senator.
Carlson was arrested at his home on Friday morning, the U.S. Capitol Police said in a statement after an investigation it conducted with the FBI and U.S. Postal Inspection Service.
All the envelopes examined so far , which were postmarked in Portland and contained an unidentified white powder , have tested negative for any toxic substances, the U.S. Attorney's Office in Portland said in a statement announcing the indictment.
But both letters cited in the indictment, one sent to House of Representatives Speaker John Boehner, an Ohio Republican, and the other to Senator Barbara Mikulski, a Democrat from Maryland, contained threats to the lawmakers.
The letter to Mikulski, addressed to her Baltimore office, "indicated that it may contain a lethal pathogen to which the recipient may have been exposed," the indictment said.
"Threatening letters - whether hoax or real - are serious concerns that federal law enforcement agencies will aggressively pursue," Greg Fowler, special agent in charge of the FBI office in Oregon, said in a statement.
Neither the indictment nor the press release accompanying it made any mention of a possible motive for the mass mailings of menacing letters.
The federal prosecutor's statement said Carlson was expected to be arraigned in U.S. District Court on Monday.
The threatening letters began showing up on Capitol Hill and in the state offices of lawmakers on Feb. 22. A number of media organizations and television shows, including The New York Times, National Public Radio and "The Daily Show with Jon Stewart," also received such mail.
A law enforcement source at the time said the sender warned that letters had been sent to the Washington or local offices of all 100 U.S. senators and that 10 contained a deadly pathogen.
In 2001, in the wake of the Sept. 11 attacks on the World Trade Center and Pentagon, deadly anthrax-laced letters were sent to several news organizations and Senate offices.
Five people were killed and 17 sickened by those letters, which federal investigators said were ultimately traced to a U.S. Army scientist who committed suicide in 2008.
Tunisians are expected to cast ballots in the elections inside Tunisia on Sunday. Around 5.2 million Tunisians, including 360,000 living outside the country, have the right to vote in the elections
Soldiers exchanged heavy fire with the militants, whose exact affiliation was unclear, and had surrounded them by midday, security sources said
A Kurdish intelligence officer in Zumar said peshmerga forces had advanced from five directions in the early morning after coalition air strikes on ISIL positions
458 candidates, including 97 women, find their way to provincial council seats; IEC Chairman blames delay in announcing results to technical problems
The United Nations General Assembly adopts resolution granting observer status to the Developing-Eight, or D-8.
The Palestinian youths pelted Israeli troops with stones and empty bottles, but the troops responded by firing teargas and birdshot, wounding ten Palestinians and making dozens of others experience temporary asphyxiation
More than 36 million citizens are set to vote and choose among 29 political parties in Sunday's early general election.
Qatar has renounced deporting Muslim Brothers leaders, Egyptian media reported.
Ismail Radwan said that the new round of indirect negotiations will start on Monday in Cairo as scheduled
60 % of French prisoners are Muslims “originally or culturally” according to French deputy Guillaume Larrive
Colorectal cancer is the leading cancer in males followed by leukemia and prostate cancer, according to the registry.
"Egypt is fighting an existential war," al-Sisi said, going on to say that his country will take "measures" along border with the Gaza Strip following the attack
Human Rights Watch calls for prosecution of military involved in killing 85 Muslims in southern Thailand
Kurdish media claimed the first units tomorrow to across Turkey's border, but news on when the peshmerga will start their passage is denied
Hamas said that two members had been detained in Bethlehem and two others in Hebron late Friday.
Jabbari had been sentenced to death in accordance "qisas" (eye for an eye) law after being found guilty of stabbing dead an older man with a kitchen knife seven years ago.