Nine new COVID-19 variant cases have been confirmed in South Korea four from the UK, three from South Africa and two from Brazil.
The Central Disease Control Headquarters made the announcement on Monday after analyzing genome sequences of 197 cases since last week.
The total number of coronavirus variant cases is now at 27.
Among them, 19 are the UK variant, five South Africa and three Brazil.
Meanwhile, the country reported 437 new infections on Monday, up 45 from the previous day.
A cluster infection at an unauthorized missionary training school over the weekend in the city of Daejeon has lead to at least 127 cases so far.
The outbreak was first reported on Saturday at the school's boarding facility run by a society called 'IM' that recruits teenagers aged 16 to 18 to be trained as international Christian missionaries.
The school has reportedly been in violation of COVID-19 measures where 159 students and teaching staff live.
Prime Minister Chung Sye-kyun called for fast and stern action as the school is part of a nationwide network.
"The most important thing is a prompt response to curb the spread. We have to make sure it doesn't become another Shincheonji religious outbreak like we had last year."
According to authorities, the rapid spread of the virus was mainly due to small living spaces compared to the number of students.
The Daejeon city government said that around 120 students have been living in dormitories and between seven and 20 students in single-dorm rooms since January 4th.
Many of them reportedly have had to share bathrooms and no partitions have been installed at the dining tables in the cafeteria.
The health authorities will carry out inspections at similar educational facilities nationwide and come up with quarantine measures.
Eum Ji-young, Arirang News.