WASHINGTON — The FBI says letters sent to President Barack Obama and Sen. Roger Wicker are related and are both postmarked out of Memphis, Tenn., dated April 8.
In an i---ntelligence bulletin obtained by The Associated Press, the FBI says the letters both say: “To see a wrong and not expose it, is to become a silent partner to its continuance.” Both letters are signed, “I am KC and I approve this message.”
The FBI says the substance in both letters have preliminarily tested positive for ricin, a potentially fatal poison.
Both the letters to Wicker, R-Miss., and to Obama were intercepted at off-site mail facilities.
The FBI says it is pursuing investigative leads to determine who sent the letters.
The letters were received at separate facilities that sort mail addressed to the White House and Capitol Hill. The mail facilities are not located on the main White House and Capitol Hill complexes.
Word of the suspicious letters comes amid already heightened tensions in Washington and across the country since the deadly bombings on Monday at the Boston Marathon that killed three people and injured more than 170. Law enforcement officials haven’t said whether they believe the letters are related in any way to the Boston bombings.
Secret Service spokesman Ed Donovan said the letter to Obama was intercepted Tuesday, the same day congressional officials alerted the public to the letter sent to Wicker. Secret Service is working with the FBI, as well as U.S. Capitol Police, on the investigation, Donovan said.