South Korean officials rushed to identify 37 victims of a hospital fire and pinpoint the cause of the worst blaze in years on Saturday. Opposition politicians blamed the president for failing to avoid the latest in a series of tragedies.

Flames and toxic smoke swept through the Sejong Hospital in the southern city of Miryang on Friday, injuring more than 150, just weeks after a fire killed 29 people at a fitness center. All the hospital victims died from smoke inhalation.

Vice Mayor Lee Byung-hee said the cause of Friday's blaze was under investigation.