About 80 North Korean soldiers and workers are reported to have been killed at a construction site while building a new headquarters for the regime's powerful National Defense Commission. 
 
The Tokyo Shimbun reported Tuesday about the deadly building collapse in October, quoting a South Korean government official.
 
According to the intelligence the official obtained from a North Korean source, the North Korean military removed the debris for two days while covering the incident scene from foreign satellites.
   
North Korea’s state-run news outlets have not yet reported about the collapse.