Usually North Korea's doing are for propaganda, so I would think no because they probably would not have the tech for it.
North Korea says it has successfully carried out its first underground test of a hydrogen bomb - a more powerful weapon than an atomic bomb. "The republic's first hydrogen bomb test has been successfully performed at 10:00 am on January 6, 2016." - announced a newsreader on North Korean state TV. More: bbc.com.