The inter-Korean industrial complex in Kaesong has resumed operations, according to Pyongyang's state-run propaganda website.
Uriminzokkiri announced the factories will run more actively, amid speculation the regime re-started production using South Korean equipment left behind at the site.
It claims other countries should not interfere with the issue as the industrial zone lies within the North's sovereign territory.
The announcement follows reports of the hermit kingdom utilizing facilities there to produce goods like clothing.
Opened in 2004, the joint factory park was home to 1-hundred-24 South Korean firms employing more than 54-thousand North Korean workers to produce labor-intensive goods such as clothes and utensils.
It was shut down by Seoul in February of 2016, in response to Pyongyang's fourth nuclear test and long-range missile launches.