WTF is going on?

Update: From same person who sent ricin letter to GOP Sen. Wicker.

Update: Via Fox News:

[B]oth letters were apparently intercepted on Tuesday. They never reached the Hill or the White House.

An FBI bulletin obtained by Fox News said the letter sent to Obama is still being screened.

The bulletin said both letters included the phrase: “To see a wrong and not expose it, is to become a silent partner to its continuance.”

Both were signed, “I am KC and I approve this message.”