SEOUL, South Korea — South Korea says it will extend its ban on incoming flights from Britain for two more weeks until Jan. 21.

Authorities said Thursday they’ve found three additional cases of the more contagious variant of the coronavirus identified in the U.K, taking the total to 14. South Korea has also found one case of a coronavirus variant detected in South Africa.

All foreigners entering South Korea will be required to submit negative COVID-19 test results starting Friday.

Officials say a recent outbreak appears to have peaked because they aren’t seeing a further upsurge in infections. The country reported 870 new cases on Thursday, the third day in a row that the figure has been below 1,000. The new cases took the national caseload to 66,688 with 1,046 deaths.

South Korea on Monday extended its second-highest social distancing rules, called “Tier 2.5,” in the greater Seoul area and the third-highest rules in other areas for two more weeks.