SEOUL – Four workers were killed and two others were missing today when a waste water storage tank exploded at a chemical plant in the South Korean industrial city of Ulsan, authorities said.
The blast at Hanwha Chemical Co. occurred when the workers were doing welding work on the tank, a spokesman from Ulsan Nam Fire Station told AFP.
â€œGas from the waste water which had piled up inside the tank was apparently ignited by the welding torchâ€œ, he said.
An investigation is under way to determine whether the accident was a result of negligence, he added. – AFP