I don't know if UN has responded this situation right now, since its general secretary is a Korean, Ban Ki-moon. Its could be a trigger for World War III if no country can't calm this situation down.
There won't be WWIII over Korean border. The last Korean war didn't do it and so won't the next. Kim is childish but not suicidal, he's just marking his territory.
Agree ... dictator keep power by putting fear on citizen with ... so called agressor / war ... like Russia do now ..
Check all country who never stop to tell -> we are near the war, we will build new weapons, buy new tank ... these are mostly the country where poverty people are the biggest one ! During this time the rich dictator can rulez the land...