South Korea's daily coronavirus cases climbed back above 4,000 on Tuesday as health authorities remain vigilant over a possible upsurge in infections and the spread of the omicron variant ahead of the Lunar New Year holiday.

The country added 4,072 new COVID-19 infections, including 3,763 local infections, raising the total caseload to 700,102, according to the Korea Disease Control and Prevention Agency (KDCA).

The number of critically ill COVID-19 patients stood at 543 Tuesday. The country reported 45 more COVID-19 deaths, raising the death toll to 6,378. The fatality rate was 0.91 percent.

The number of imported cases was tallied at 309, bringing the total imported cases to 21,932. (Yonhap)