POSTED: Wednesday, April 17, 2013 - 9:43am
UPDATED: Wednesday, April 17, 2013 - 11:25am
Washington, D.C. (CNN) — A letter addressed to President Barack Obama that contained a "suspicious substance" has been intercepted at the White House's off-site mail facility, a Secret Service spokesman said Wednesday.
The letter arrived Tuesday, the same day as an envelope addressed to a U.S. senator that initially tested positive for the deadly poison ricin.
The suspicious letters addressed to President Barack Obama and a U.S. senator contain the same language, a law enforcement source said. The language was, according to the source: "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."
KETK will update information as it becomes available.