One of South America's most important drug-trafficking networks has been destroyed in raids by U.S. Drug Enforcement Administration agents and Bolivian police, officials said Friday.

At least 300 anti-drug police and 20 DEA agents destroyed cocaine-processing labs and seized airplanes, radio transmission facilities, ranches and mansions, said Don Ferrarone, DEA chief in Bolivia.A U.S. agent was wounded in gunfire during the raids, which began Monday. Two traffickers were killed and several wounded.