People wearing face masks to help curb the spread of the coronavirus walk along a street in Beijing, capital of China, Dec 6, 2020. (ANDY WONG / AP)

BEIJING - China's National Health Commission said Monday that it received reports of 15 newly confirmed COVID-19 cases on the Chinese mainland Sunday, three of which were domestically transmitted in the Inner Mongolia autonomous region.

Twelve cases imported from outside the mainland were reported in Shanghai, Guangdong, Zhejiang, Fujian and Yunnan, the commission said in its daily report.

Two new suspected cases arriving from outside the mainland were also posted in Shanghai, it added.

The National Health Commission said 12 new imported cases were reported in Shanghai, Guangdong, Zhejiang, Fujian and Yunnan

No additional deaths related to the disease were reported.

Another 13 patients were discharged from hospitals after recovery, the commission said, adding that there were 281 patients still receiving treatment, including six in severe condition.

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By the end of Sunday, a total of 3,948 imported cases had been reported on the mainland. Among them, 3,703 had been discharged from hospitals following recovery while 245 remained hospitalized. No deaths had been reported among the imported cases.

Overall, the mainland has reported 86,634 confirmed cases by Sunday, including 81,719 recoveries and 4,634 deaths, according to the commission.

There were currently five suspected cases on the mainland, and 5,758 close contacts remained under medical observation.

Sunday also saw six newly reported asymptomatic cases arriving from outside the mainland, and one imported asymptomatic case was re-categorized as a confirmed case.

A total of 231 asymptomatic cases were under medical observation, all of which were imported cases, the commission said.

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By the end of Sunday, 6,897 confirmed cases, including 112 deaths, have been reported in Hong Kong Special Administrative Region (SAR), while Macao SAR has recorded 46 confirmed cases and Taiwan has logged 716 cases, including seven deaths.

Altogether, 5,567 COVID-19 patients in Hong Kong SAR, 46 in Macao SAR and 574 in Taiwan have been discharged from hospitals.