South Korea warned that North Korea may test a nuclear weapon after a planned missile launch this month that is already raising regional tensions the most since Kim Jong Un in December succeeded his father as head of the totalitarian state.

China, South Korea and Japan expressed concern over North Korea’s plan to put a satellite into orbit with a long-range rocket between April 12 and 16, which the U.S. says would scuttle a food aid deal. Zeb Eckert reports on Bloomberg Television's "First Up" with Susan Li. (Source: Bloomberg)

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