A two-year study by a Senate panel shows high U.S. officials intervened "numerous" times to halt operations against overseas drug kingpins, Sen. John F. Kerry, D-Mass., said Friday.

"I think you will be shocked by the degree of nonfeasance - and at times malfeasance - on the part of our government," Kerry said of the study, slated for release next week by the Senate Subcommittee on Narcotics and Terrorism."The subcommittee received testimony revealing numerous occasions in which high U.S. officials intervened to stop law enforcement operations aimed at nailing drug kingpins," he said in remarks prepared for a conference on narcotics and national security at Tufts University.

"We found that a U.S. ambassador to the Bahamas had shut down a Justice Department sting operation aimed at bringing down corrupt Bahamian officials," Kerry said.