The threat posed by North Korea's nuclear programme has reached an "extremely dangerous level", an adviser to South Korea's president has said.
It was not clear whether the comments by Kim Tae-hyo, President Lee Myung-bak's deputy national security adviser, followed new intelligence.
A recent report by the Washington-based Institute for Science and International Security said satellite images showed new construction activity near North Korea's nuclear reactor. The "rogue state" quit disarmament talks last year after a row over its testing of a missile.
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- Disarmament
- North Korea
- Pyongyang
- South Korea
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