Senators from California, Wisconsin and California are urging the State Department to take action to protect a group of Hmong refugees at an immigration detention center in Thailand.
The six senators wrote to Secretary of State Condoleezza Rice about the roughly 150 Hmong refugees who have been held for ten months at Nong Khai.
They're asking Rice to press the Thai government to provide better living conditions and bring about a swift resolution for the refugees fleeing what the senators described as persecution in their native Laos.
The State Department says it hasn't seen the letter.
The Thai embassy in Washington had no immediate comment.
The Hmong are an ethnic group from Laos who fought alongside the U.S. during the Vietnam War.
Many settled in the U.S. starting in the 1970s, with most settled in California, Minnesota and Wisconsin.
The letter was signed by Wisconsin Democrats Russ Feingold and Herb Kohl, California Democrats Dianne Feinstein and Barbara Boxer,
Minnesota Democrat Amy Klobuchar and Minnesota Republican Norm