A self-proclaimed "anti-American" group is threatening to launch terrorist attacks against diplomatic compounds, airlines and public transportation systems in eight countries allied with the U.S. in Iraq, a South Korean official said Thursday. The group, called the "Yello-Red Overseas Organization," warned in a one-page letter sent to the South Korean Embassy in Thailand that it will launch the attacks through April 30. The group described itself as "anti-American" and threatened to attack diplomatic compounds, airlines and public transportation systems in South Korea, Japan, Thailand, the Philippines, Singapore, Australia, Kuwait and Pakistan.