"While most religious facilities are actively participating in state antivirus measures, the public has become alarmed after an outbreak at BTJ Center for All Nations has spread throughout the country," Chung said during an interagency meeting on the Covid-19 response held at the government complex in Sejong, 120km south of Seoul.
The evangelical church facility in Sangju, 270km southeast of Seoul, has emerged as a new hotbed of infections, with over 660 cases linked to it, the Yonhap news agency reported.
"The government will not tolerate or condone irrational behavior, such as interference with tracing activities or refusing tests, that blatantly threaten people's lives and public safety," said Chung.
According to authorities, the church allegedly caused mass infections by hindering health authorities' infection prevention efforts and refusing to cooperate with an epidemiological investigation.
They said more than 3,000 people are estimated to have been exposed to the church-traced potential infections, and nearly 70% of them have not been tested yet.
Chung criticised the operator of the BTJ Center for causing the public to become "dumbstruck," as it filed an administrative suit against the city of Sangju as soon as the city issued a shutdown order for the facility.
The prime minister asked local governments to swiftly track down BTJ members who have refused to be tested and also requested that local officials hold those who have caused harm to public health responsible by means such as indemnity suits.