After 20 more cases were reported in the capital, officials announced that some local areas had been locked down with residents being tested, reports BBC.

Separately, organisers of the Olympics reported 34 new infections within the event's "closed-loop" bubble, the British media reported.

Officials told the news channel it included 13 athletes or officials arriving at the airport.

An athlete testing positive will need to remain in isolation and will only be allowed to compete after getting two negative test results in 24 hours.

The Chinese mainland on Saturday recorded 54 locally transmitted Covid-19 cases, 17 more than the previous day, data from the National Health Commission showed Sunday.