Subway Explosion Kills Up To 4 People In South Korea

It appears that another incident involving safety has claimed more lives in South Korea:

Four workers were killed and 10 others were injured Wednesday, when a subway construction site near Seoul collapsed due to what is believed to be an explosion of an oxygen cylinder, police said.

The victims, who were trapped under debris 15 meters underground, were transported to nearby hospitals for treatment, according to authorities.

The accident, which occurred in the city of Namyangju, east of Seoul, around 7:20 a.m., took place when a total of 17 workers were doing welding work.

A witness said there was a huge blast, but the police said they believe explosives were not being used at the time of the collapse.

The number of deaths could increase as some of the injured are in critical condition, the police said.

Police and firefighters said they are investigating the exact cause of the accident.  [Yonhap]