More than 200 people are feared to have died when a tunnel caved in at North Korea’s nuclear test site after its latest detonation, a Japanese news report said on Tuesday.
A tunnel collapsed at Punggye-ri in early September, days after North Korea conducted its sixth and largest underground nuclear test on September 3, TV Asahi said, quoting unnamed North Korean sources.
Some 100 workers were involved in an initial collapse. Another cave-in occurred during rescue operations, leaving at least 200 people feared dead in total, the Japanese broadcaster said. The accident was triggered by the test, TV Asahi added.
Experts have warned that the underground tests could cause the mountain to collapse and leak radiation into the atmosphere near China’s border.
The blast caused a 6.3-magnitude earthquake, according to the US Geological Survey, followed a few minutes later by another with a magnitude of 4.1. Japan assessed the yield from the test of what the North said was a hydrogen bomb at 120 kilotons, eight times the size of Hiroshima in 1945.