U.S. top nuke envoy declined invitation, Pyongyang says

North Korea on Sunday lambasted the U.S. for shifting blame for the current lack of dialogue and frosty relations, saying that Washington's top nuclear negotiator has turned down a recent invitation to Pyongyang. The offer came after Sung Kim, U.S. special representative for North Korea policy, had displayed his willingness to meet with North Korean officials during his Asia tour last week.

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