South Korea declared a "special care zone" Thursday around a second city hit hard by the coronavirus while the U.S. military confirmed two new cases among relatives of its troops in the country, which is battling the biggest epidemic outside China.

Australia became the latest country to impose travel restrictions on South Koreans, with almost 100 nations now limiting arrivals from the country, which reported 438 new coronavirus cases on Thursday for a total of 5,766.

The South Korean government declared a special care zone around Gyeongsan, about 250 km (150 miles) southeast of Seoul, promising extra resources such as face masks and warning people from traveling there.