WASHINGTON — The State Department is organizing at least two evacuation flights for Americans who want to leave Bolivia amid widespread and worsening political unrest there.

Officials in Washington and at the U.S. Embassy in La Paz said the flights will leave Bolivia today for neighboring Peru. The move comes as relations between the United States and Bolivia have plummeted in the past week, with each country expelling the other's ambassador and increasing U.S. criticism of Bolivia's drug-fighting efforts.

Last week, the Drug Enforcement Administration was forced to move its operations from one of Bolivia's largest coca-producing areas for security reasons.