The Korea Herald wrote that the deceased was a subcontractor who was among the 10 others doing repair work at the alkylation processing line in the refinery in Ulsan, about 415 kilometers southwest of Seoul, when the blast occurred at 8:52 p.m. Thursday.
The nine others sustained injuries, mostly severe or minor burns. They were all sent to a hospital for treatment.
A total of 26 people were working at the site, including 14 S-Oil employees, at the time.
Firefighters are still working to put out the fire, according to the reports.
MP/PR