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.
Antonio Ledezma, a fierce critic of President Nicolas Maduro who fled Venezuela in 2015, said that "a humanitarian intervention is justified" in the country, given the brutality of the Caracas government.
Trudeau addressed a business conference in Mumbai on Tuesday morning, attended by leaders from the Tata conglomerate, IT giants Infosys and pharmaceutical major Jubilant Life Sciences.
The incident, which caused no injuries, is the latest in a string of accidents involving the US military that have prompted concern from Japanese officials and renewed criticism of the US military presence in the country.
Rest of the tanks will be delivered in April, forming a fully armored unit, says Iraqi Army Chief of Staff
Terrorists were reportedly plotting to attack Turkish bases
Israeli army says the attack came after rocket fire from Gaza
Trump's special representative has blamed Hamas for causing "misery" in Gaza
It is still a wide-open race to succeed President Enrique Pena Nieto, who is deeply unpopular heading into the final stretch of his six-year term in a Mexico beset by endless corruption scandals and record levels of violent crime.
His comments came as he faces criticism from survivors of the attack over his ties to the powerful National Rifle Association, and after several thousand rallied in Florida to demand urgent action on gun control.
Temer came to the city to meet Governor Luiz Fernando Pezao, several ministers and General Walter Souza Braga Netto, who will lead the operation and who was in charge of coordinating security when the city hosted the 2016 Olympic Games.
Muslims have suffered the most by far from ISIL’s terrorist attacks, Iraqi premier tells Munich Security Conference
Israel struck six targets affiliated with Hamas's armed wing in Gaza Strip, Palestinian security source says
Washington concurs with Ankara on need for locals taking control of liberated areas, says US defense secretary
Army uses live ammunition, rubber bullets to disperse stone-throwing Palestinians in West Bank, Gaza