SOUTH KOREA - Police investigating a deadly gas leak at a local power plant found on Wednesday that employees did not comply with safety rules before the accident which left one dead and three others in critical condition.
The incident occurred at Hyundai Greenpower in Dangin, South Chungcheong Province, on Tuesday evening.
Police said six out of the nine workers on the scene didn't wear gas detectors. One worker was poisoned by the gas while doing maintenance work on the plant's boiler. His co-worker, who came to his rescue, also inhaled the toxic gas, officials said.
The boiler uses blast furnace gas, a type of gas that is a byproduct of iron ore smelting, and produces toxic gases, including carbon dioxide, carbon monoxide and nitrogen.
"It looks like the blast furnace gas leaked while workers were on maintenance jobs," an official said. "We will investigate whether they were following the safety rules properly."
Investigators said they are looking into whether the company conducted safety checks and what have caused the gas leak.
Labor Minister Phang Ha-nam apologised and pledged tougher inspections a day after the accident.
"I feel like I need to apologise to the public," the minister said at a meeting of the National Assembly Environment and Labor Committee.