Here is further information about the crackdown currently going on along the North Korean border which has been so great the North Koreans established yet another gulag to put defectors into:

Amid signs of mass defections as the international community began putting pressure on North Korea in the wake of its latest nuclear test, the regime in early May gave orders that no resident was to be allowed to flee the country, followed by a massive crackdown.

The National Defense Commission gave village-to-village indoctrination lectures on a massive scale, apparently prompted by fears that the times when the order alone was enough were gone. Anybody who crossed the Apnok (Yalu) or the Duman (Tumen) River without permission would be considered a traitor, villagers were told.

The Chongori reeducation center in North Hamgyong Province that went through the greatest change. The center has been reorganized as a concentration camp exclusively for arrested defectors. It has reportedly turned into a living hell, where labor is much heavier than at ordinary reeducation centers and where torture and beatings are routine.  [Chosun Ilbo]

Read the rest for more details but reportedly the prisoners at the Chongdori Reeduction Center are working 14 hour days and are given very little food.  Many die from malnutrition.  This new camp is supposedly worse than even the infamous Yodok prison camp.  However, the reports of the conditions from this camp are not as bad as Camp 14, but probably similar to Camp 22 if it is worse than Yodok.