By the CNN Wires Staff
April 2, 2010 9:18 p.m. EDT
-- A domestic extremist group has sent letters to more than 30 U.S. governors demanding they resign, the Department of Homeland Security and the FBI said in an intelligence note.
The note, dated Monday, said the letters told the governors to vacate their posts within three days.
and DHS said there do not appear to be credible or immediate threats of violence attached to the letters.
behind the letters has a "Restore America Plan" that calls for the removal of any governor who fails to comply, the intelligence note said.