SHANGHAI -- Shanghai reported 16 new imported COVID-19 cases and no increase in domestically transmitted cases on Thursday, the municipal health commission said on Aug 14.

The imported cases involve 13 Chinese nationals, two Filipinos and one Russian.

All 16 cases have been transferred to designated medical institutions for treatment, and 253 close contacts of the patients on the same flights have been put under quarantine.

As of Thursday, Shanghai had reported 474 confirmed imported cases and 342 locally transmitted cases.