Hundreds of churches across South Korea closed their doors Sunday and held online services as the country reported its lowest number of new coronavirus cases in more than a week.

South Korea - which has the highest number of confirmed COVID-19 cases outside China with 7,313 - added 272 new cases Sunday, far below daily increases of around 500 recently.

Two more people died, bringing the death toll to 50, according to the Korea Centers for Disease Control and Prevention.

"Despite the smaller rise in COVID-19 cases, we are not at a point where we can say the situation has improved," said health minister Park Neung-hoo.

"Small cluster infections can emerge at any time in closed spaces like group facilities or religious events," KCDC director Jung Eun-kyeong told reporters.

Yoido Full Gospel Church - the largest Protestant Church in South Korea with around 560,000 registered members - was among hundreds of churches that held online services on Sunday.

"Although it is the rule to come to church for service, this is an emergency situation," said elder Kim Doo-young.