The roof of a resort auditorium collapsed during a welcoming ceremony for South Korean university students, killing at least eight and seriously injuring 15 others, officials said.
More than 10 people were feared trapped as heavy snow reportedly hampered rescue operations.
Fifty-eight other students received minor injuries after the collapse late on Monday, according to an official at the state-run National Emergency Management Agency.
He confirmed the eight deaths and said rescuers feared at least 10 other people were trapped.
South Korean media reported that the heavy snowfall was believed to have resulted in the collapse, but the cause was still being investigated.
The collapse came as about 1,000 students from Busan University of Foreign Studies gathered for an orientation event for first years at the resort in the south-eastern city of Gyeongju.
More than 500 of the students were in an auditorium when the roof collapsed, the official said. Many of the students managed to get out of the building by themselves, he said.
Gyeongju is a historic city that served as the capital of one of the Korean Peninsula's ancient kingdoms. It is a popular tourist destination.