In this file photo, an airplane carrying South Korean citizens repatriated from Wuhan lands in Seoul, South Korea, January 31. Chung Sung-Jun/Getty Images

South Korea is sending a third chartered plane to Wuhan to repatriate its nationals and their Chinese families, vice minister of health and welfare Kim Gang-lip said Tuesday.

Kim said 170 people are expected to board the plane and South Korean authorities are considering allowing Chinese family members of its citizens to board the plane.

The flight will leave South Korea’s Incheon airport Tuesday evening at 8:45pm local and will arrive back in Gimpo airport in Seoul Wednesday morning, Kim said. Those repatriated will be quarantined at Korea Defense Language Institute, a military school facility located in a rural area, Kim said.

There were about 2,000 South Korean citizens living in Wuhan before the epidemic, according to the Health and Welfare Ministry. More than 700 South Korean nationals were repatriated on the first two flights.

Seoul also announced Tuesday that it will include the semiautonomous Chinese cities of Hong Kong and Macao in its "contaminated zone" list.

The designation will go into effect Wednesday at midnight. Those entering South Korea from the two cities will be required to fill out a health questionnaire and be checked for fever. They might also be subject to a "quarantine/epidemiological investigation."

Those presenting symptoms, including a fever, will be subjected to a check-up and, if suspected of carrying virus, will be immediately isolated or put under watch.

The Ministry also recommended South Korean nationals avoid travel to Japan, Taiwan, Singapore, Malaysia, Vietnam and Thailand.