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South Korea's Foreign Minister yesterday said it was obvious that North Korea sank one of the South's warships in March, killing 46 sailors.

Yu Myung Hwan said that investigators had enough evidence of North Korean involvement in the sinking of the Cheonan to warrant taking Pyongyang to the United Nations Security Council.

Yu's comments were the first by a South Korean official clearly pointing the finger at North Korea for one of the worst attacks on the South since the two Koreas signed a truce in 1953 to end three years of fighting.