- Witnesses said there was a loud explosion, but police said that in principle were not using explosives at the site.
- Officials fear increase the number of dead as some of the injured are in critical condition.
- at the time of the incident there were 17 service employees in the work.
at least four workers have died Wednesday and ten others injured in South Korea in the collapse of a construction Seoul subway by a explosion, local police said.
the accident occurred at 07.30 local time (00.30 CET Spanish) in the city of Namyangju, east of the capital, when 17 employees were on service in the work .
Eyewitnesses claimed that there was a strong explosion, but police said that in principle not were using explosives in place.
One of the fatalities died from the impact of the explosion while the remaining three were found under the rubble , as part of the injured.
the authorities fear an increase in the number of deaths as some of the injured are in critical condition .
the bodies of police and firefighters said they have opened research to clarify the causes of the accident.