A South Korean apartment complex is under lockdown after one third of its residents became infected with the novel coronavirus in the city of Daegu, according to the Korean Centers for Disease Control and Prevention (KCDC).

Of the 140 residents in the two apartment buildings, 94 are members of the Shincheonji religious group, Daegu Mayor Kwon Young-jin said on Saturday. The apartment complex is to be under quarantine, he added.

So far, 46 residents have been confirmed to have the virus, 80 have tested negative and the remaining 14 are being tested, KCDC said.

The Shincheonji group said in a statement on Sunday that 80 of its members are living at this apartment currently, not 94 as announced by the Daegu city mayor, and the group is looking into the discrepancy between their own information and Daegu city’s.

There are a total of 7,134 cases of the virus nation-wide and Daegu city is the most heavily hit area of the country. About 90% of South Korea’s infected cases are from Daegu city and North Gyeongsang Province, which surrounds Daegu, combined.