South Korea calls for tough sanctions response to North Korea nuclear test

(Reuters) South Korea warned North Korea on Wednesday that the United States and its allies were working on sanctions to inflict "bone-numbing pain" after its latest nuclear test, and called on China to do its part to rein in its isolated neighbor.

The U.S. House of Representatives voted nearly unanimously late on Tuesday to pass legislation to broaden sanctions on the North's nuclear program.

Meanwhile, North Korean leader Kim Jong Un called for an expansion of the size and power of his isolated country's nuclear arsenal, state media reported on Wednesday.

Last week's nuclear test was North Korea's fourth, although the United States and experts doubt the North's claim that it was of a more powerful hydrogen bomb, as the blast was roughly the same size as that from an atomic bomb test in 2013.