According to preliminary data, killed 4 people.
Near Seoul collapsed during the construction of the metro.
The number of victims is ten people. And the number of deaths, according to preliminary data, is for four people.
The collapse occurred Wednesday morning in the construction of metro in the city of Namyangju near Seoul. Presumably because of the explosion of the oxygen tank.
At a depth of 15 meters 17 workers carried out the welding work.
Police said the most likely version of the explosion of oxygen, not explosives.
Firefighters and police are investigating the cause of the accident.
