Watch | North Korea proudly announces hydrogen bomb test

This high-pitched, patriotic announcement by the North Korea state media says it has successfully conducted its first hydrogen bomb test.

The announcement on North Korean state TV followed detection of a 5.1 magnitude earthquake near its known nuclear test site earlier on Wednesday. It is being said that the announcement complicates already difficult efforts to curb the country's push for a working nuclear arsenal. A nuclear test is as a major slap in the face to the North's chief ally China and extinguish any chance of a resumption of six-country talks on North Korea's nuclear programme that Beijing has been pushing for.