![Letters Containing Ricin Sent to President, Two Senators [UPDATED]](http://townsquare.media/site/241/files/2013/04/White-House-at-dusk.jpg?w=980&q=75)
Letters Containing Ricin Sent to President, Two Senators [UPDATED]
1:10 p.m. (EST): A third letter, this one sent to Senator Joe Manchin (D.-W.V.), has been found to contain ricin.
12:45 p.m. (EST): FBI spokesman Paul Bresson has confirmed that the substance found in the letter to the president was ricin.
The Secret Service says that a letter containing a suspicious substance and addressed to President Obama was received on Tuesday at a White House mail facility.