A 33-storey apartment building is in flames in the South Korean city of Ulsan, local media, including Yonhap news agency, report.
The fire is thought to have started on the 12th floor and has since spread to the upper storeys, according to reports.
Some outlets showed footage of the structure engulfed in flames and slabs of burning concrete falling to the street below.
A media report said rescue workers from the fire brigade had tried to evacuate the apartment building as quickly as possible.
Hundreds of people were evacuated from the building, the BBC reported citing Yonhap, after the fire broke out about 11pm (local time) on Thursday.
The fire department said 77 people were rescued and 88 people were taken to hospital for smoke inhalation, according to Yonhap.
Firefighters found it hard to control the flames due to strong winds, according to the BBC.
The blaze was brought under control after two hours, but it continues to burn on Friday morning, Yonhap reported.
“Suddenly, the fire came up. The windows were broken and the living room and bedroom lit up,” one witness told the news outlet.
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