Up to 200 construction workers are feared dead after one of the North Korean regime’s nuclear test sites collapsed on Oct. 10, according to a Tuesday report from a Japanese TV station.

The Punggye-ri test site had been riddled with unstable underground tunnels at the time the nuclear test unleashed a 6.3-magnitude earthquake on Oct. 10, according to Japan’s Asahi TV. Following the test, 100 workers reportedly were crushed inside the tunnels while 100 others were killed during a rescue attempt when the tunnels caved in again.

Punggye-ri’s tunnels reportedly were weakened severely after North Korean dictator Kim Jong-un’s regime conducted its sixth nuclear test on Sept. 3 amid escalating tensions between the country and the United States and its allies.

The collapse occurred after Chinese scientists warned the rogue regime about the risks of a collapse if continued nuclear tests took place. In addition, experts also expressed their concerns about the possibility that continued tests would expose the country and its neighbors to radiation. But North Korea chose not to heed those warnings.

The reports of the deadly collapse arose the same day that Jong-un’s regime blasted President Donald Trump for carrying out a “vicious vituperation against the DPRK” as “an expression of their frustration, fear and horror,” according to a statement from the Korean Central News Agency.

“The U.S. has to ponder over the possible consequences,” the statement continued.