Transcript for Report Says N. Korea Can Attach Nuke to Long-Range Missile
Hat dangerous standoff with north korea. Secretary of state john kerry just arrived in south korea after the release of a new intelligence report concluding that north korea could probably put a nuclear bomb on a long-range missile. Martha raddatz tracking all the developments and, martha, all kinds of tough talk from north korea. Still no missile test. Reporter: No missile test yet, george. But this assessment which was supposed to stay classified has raised the temperature further just as the u.S. Was trying to tamp it down and convince north korea not to launch those midrange missiles. Overnight the pentagon scrambled to downplay the assessment buried deep in a classified defense intelligence agency report, which says they believe with moderate confidence that north korea has, quote, nuclear weapons capable of delivery by ballistic missiles." Sources tell abc news, that sentence was accidentally declassified and that the intelligence agencies were caught off guard when congressman doug lambbourne asked about it late thursday. Congressman, with the number of caveats you put on the front end of this, I'm not -- I can't touch that one. Reporter: Early this morning secretary of state john kerry talked about the report. The united states and the republic of korea both want to see a peaceful korean peninsula. Reporter: Those comments follow president obama's rare remarks about the increasingly heated tension with north korea calling on the rogue state to cool down its rhetoric even as the u.S. Is moving warships and sophisticated radar into the region in anticipation of a launch. Now is the time for north korea to end the kind of belidge rent approach that they've been taking and to try to lower temperatures. Reporter: Meanwhile, in north korea, celebration for the upcoming anniversary of the birth of kim ill suggest but next to the masses of flowers in his honor small replicas of north korean missiles. We should make clear that there is no indication that north korea is trying to arm any of the missiles it is expected to launch with nuclear weapons. But this assessment is alarming no matter how much the administration is trying to distance itself from it.
This transcript has been automatically generated and may not be 100% accurate.