At POSCO Pohang Steelworks at about 1:30 p.m. on the 20th, people doing cleaning work collapsed after inhaling gas.
According to fire authorities, three people were found in cardiac arrest, and three others had minor injuries. All were taken to hospitals.
They were reportedly exposed to toxic gas while cleaning sludge (residue) outdoors at the STS No. 4 steelmaking plant in Pohang Steelworks. Fire authorities suspect carbon monoxide suffocation.
At POSCO Pohang Steelworks on the 5th, hydrofluoric acid gas also leaked, killing one worker and injuring three.
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