Analysts see a direct attack on Seoul as extremely unlikely. The warning Tuesday from the North's Korean Asia-Pacific Peace Committee is similar to past threats that analysts call an attempt to raise anxiety in foreign capitals.
Observers say a torrent of North Korean prophesies of doom is partly meant to win Pyongyang-friendly policy changes in Seoul and Washington and to boost the image of leader Kim Jong Un.
Last week, North Korea told foreign diplomats based in Pyongyang that it will not be able to guarantee their safety as of Wednesday.
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