But President Alvaro Uribe vowed on Friday to press ahead with U.S.-financed fumigation of cocaine-producing crops.
The war on drugs in Colombia, the world's main cocaine-producing country and a major supplier of heroin, has cost more than $3 billion in U.S. aid here since 2000. Critics of Washington's effort say the report indicates the Colombia and U.S. governments are losing the war.
"The U.S. government's own data provides stark evidence that the drug war is failing to achieve its most basic objectives," said John Walsh, of the Washington Office on Latin America, a think tank critical of U.S. drug policies in Colombia.
ONDCP press release
Washington Office on Latin America press release