That's a South Korean report, Dave, I advise to take it with a pinch of salt. Sounds a bit like the old "Iraqi soldiers ripping Kuwaiti babies out of incubators and killing them". They did not as the US State Department admitted about ten years later.
Last death at the Korean border was a South Korean. Shot by South Koreans as he tried to make his way to the North. Those two countries use every trick in the book to defame each other.
That is not to say that horrible things might not be happening in North Korea, but this here sounds a bit carried away to me. All western reports I have read about it have only credited that one South Korean newspaper with it. That is not thorough journalism.