At first when I read this I thought that the NK government destroyed them because somebody figured out how to use broadband over power lines. It wouldn’t surprise me that they would destroy their own infrastructure to prevent people from talking over their electrical distribution system.
Could this simply be a case of the Commies blaming everything bad that happens on counter-revolutionary elements? Maybe the towers were of shoddy construction and just fell down on their own. Maybe the towers did not fall down and all and the reason there is no electricity is because nobody is generating electricity.