Breaking: North Korea Shells South Korea Island; Seoul on Highest "Non-War Alert"

UPDATE 1220 GMT: The South Korean President's office says Lee Myung-bak has ordered the military to strike North Korea's missile base around its coastline artillery positions if it shows signs of additional provocation.

The spokeswoman added that, in a video conference with Gen. Han Min-koo, Chairman of the Joint Chiefs of Staff, the President ordered "multiple-fold retaliation" against North Korea for its artillery attack today.

UPDATE 1130 GMT: The South Korean military has confirmed its two-day exercise on Yongpyeong Island before the North Korea attack, but it says South Korean forces fired west and not north.

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