The Chinese mainland on Sunday reported 23 newly confirmed COVID-19 cases, including four locally transmitted cases and 19 arriving from outside the mainland, the National Health Commission said Monday.

A medical worker in protective suit collects a swab sample from a boy for COVID-19 nucleic acid testing in the subdistrict of Baihedong in Liwan District of Guangzhou, south China's Guangdong Province, June 12, 2021. (Photo: Xinhua)

The four locally transmitted cases were reported in Guangdong Province, the commission said in its daily report.

There were 322 active imported cases as of Sunday. No deaths related to the disease were reported, while 11 COVID-19 patients were discharged from hospitals.

The total number of confirmed cases on the Chinese mainland stood at 91,451 and the cumulative death toll was 4,636 as of Sunday.