Investigators reported Friday that at least nine governor's offices had received letters designed to ignite when opened. The most recent arrived at Oregon Gov. Ted Kulongoski's and Massachusetts Gov. Mitt Romney's offices Friday, although they was not opened. Similar letters have also been received in Montana, Texas, Idaho, Nebraska, Washington, Utah and New York, and all the letters have borne a return address of Ely State Prison in Nevada. Investigators said the inmates whose names were on the letters are being questioned. No one has been injured by any of the letters, although the Montana Capitol was evacuated Thursday after the suspicious letter arrived. AP has more.