Tongliao city of the Inner Mongolia autonomous region on Monday reported one new locally transmitted confirmed case of COVID-19 and one new local asymptomatic carrier, according to the city's epidemic prevention and control headquarters.

The two cases tested positive for the virus on Sunday night and the re-check conducted by the city's center for disease control and prevention on early Monday showed the same result, CCTV reported.

The region reported 20 local confirmed cases and one local asymptomatic carrier on Sunday, the region's health commission said on Monday.

All the cases were found in the border city of Manzhouli.

One residential community in Dongshan sub-district has been adjusted to a high-risk area for COVID-19 and one residential community in Nanqu sub-district has been classified as a medium-risk area starting from Sunday.

In Heilongjiang, Nehe, a county-level city in Qiqihar, reported a local asymptomatic carrier on Sunday, according to a statement released by the Nehe epidemic prevention and control headquarters.

The case was found positive for the virus during a nucleic acid testing conducted on those who arrived from outside the province on Sunday morning.

According to the case's movements, the case attended a wedding ceremony held in Manzhouli in Nov 20, the statement said.