Letters are still being handled so far, the spokesman said, but added delays were possible.

Authorities on Friday reported 5,090 new cases in mainland China, including more than 120 deaths, taking the total number of infected to 63,851, and the number of deaths from the disease, now labelled Covid-19, to 1,380.

(Reporting by Matthias Inverardi; Writing by Christoph Steitz; Editing by Mark Potter)