HOHHOT -- Two streets in the China-Russia border city of Manzhouli, North China's Inner Mongolia autonomous region, have been classified as medium-risk areas for COVID-19, local health authorities said Sunday.

The affected regions are Dongshan Street and Beiqu Street, according to the city's epidemic prevention and control headquarters.

Two new locally-transmitted confirmed COVID-19 cases were reported Saturday in the city. The patients are currently undergoing treatment at a local hospital and all close contacts have been put under quarantine.

Further epidemiological surveys into the cases and the related screening work are underway.

Authorities in Manzhouli have closed off the residential compound where the cases were found, and city-wide nucleic acid tests will be conducted.

Public venues in the city have suspended operations, and schools, kindergartens and training centers also halted teaching activities.