On the morning of the 17th, two men were found lying down in a tunnel in a mine in Chichibu City, Saitama Prefecture, and both died at the hospital where they were transported.
The police are investigating the cause of oxygen deficiency based on the situation at the scene.
After 11:00 am on the 17th, a man in his 50s reported to the fire department that "a man who entered the tunnel collapsed due to lack of oxygen" at a mine tunnel in Nakatsugawa, Chichibu City, Saitama Prefecture.
When the fire department rushed to the scene, two men in their 30s and 40s were found lying about 300 meters from the entrance of the tunnel.
The two were taken to the hospital, but were soon confirmed dead.
According to the police, the oxygen concentration was almost zero near the site where the two were found, and the police are investigating in detail, assuming that they died due to lack of oxygen.
The two men who died were in a mine tunnel in a group of four people, two other men who met through SNS, so the police are also investigating the purpose of the actions of the four people. ..