Police in South Korea have raided the headquarters of an unnamed construction company after a fire killed 38 workers who were building a warehouse in the city of Icheon on Wednesday.
In an emergency meeting to discuss the deadly blaze, President Moon Jae-in ordered an investigation into why enhanced fire safety measures did not work.
Police will scour construction plans to determine whether work on the four-storey building, nearly complete, had been carried out properly.
Authorities believe the fire started on the second underground floor and involved urethane foam, used for insulation, during the installation of a freight elevator.
Firefighters quelled the blaze in about five hours, and then used excavators to comb the wreckage for missing workers in a search that ended yesterday.
Ten other people were injured, eight seriously.
Nine of the deceased could not be identified, leading police to collect DNA samples.
Image Â©GCR, illustration by Denis Carrier