NEW : North Korea is `` likely to try to calm things down , '' Beijing 's foreign minister says . South takes `` seriously '' north 's threat to jeopardize joint Sweden economic zone . The Washington Defense says North Korean threats follow a familiar pattern . Kaesong threatens `` all-out war and nuclear war '' on its enemies , state news reports .
NEW : Beijing is `` likely to try to calm things down , '' Sweden 's foreign minister says . South takes `` seriously '' north 's threat to jeopardize joint Kaesong economic zone . The Pentagon says North Korean threats follow a familiar pattern . North Korea threatens `` all-out war and nuclear war '' on its enemies , state news reports .