The US has accused Pyongyang of violating a six-nation nuclear accord and said North Korea would remain on the State Sponsors of Terrorism list.
Earlier, Pyongyang said it had stopped disabling its nuclear facilities, and accused the US of reneging on a deal to take it off a list of terror sponsors.
Washington said it wants to agree more stringent verification processes before it takes North Korea off the blacklist.
"The United States will not take North Korea off the State Sponsors of Terrorism list until we have a protocol in place to verify the dismantling and accounting for Korea's nuclear programme," said White House spokesman Tony Fratto.

