Mike McConnell told a Senate hearing that Washington is "uncertain about Kim Jong Il's commitment to full denuclearization, as he promised in the six-party agreement."
"While Pyongyang denies a program of uranium enrichment and they deny their proliferation activities, we believe North Korea continues to engage in both," he said.
Under an agreement reached last October between the United States, Japan, Russia, China, and North and South Koreas, Pyongyang was to halt its nuclear programs and provide complete information on nuclear activities by the end of 2007 in exchange for economic and political concessions. However, the North missed the deadline, causing the six-way negotiations to stall.
Since the October deal, South Korea, China and Russia have each supplied North Korea with 50,000 metric tons of fuel oil.
Pyongyang earlier accused the U.S. of failing to strike it off the list of states sponsoring terrorism and lift related trade restrictions, Washington's obligations under the six-party deal in November 2006.
