SHANGHAI, March 20 (Xinhua) -- Shanghai reported eight newly confirmed cases of novel coronavirus disease (COVID-19) from other countries Thursday, the local health authority said Friday.

The municipal health commission said a total of 33 imported cases had been reported in Shanghai by the end of Thursday, while 23 suspected imported cases are under quarantine for further confirmation.

Among the eight imported cases on Thursday, seven patients are Chinese citizens returning from the United States and European countries including the United Kingdom, Switzerland and Spain, and one is Spanish from Spain. All of them were quarantined and tested positive for the virus upon arriving at Shanghai Pudong International Airport and Shanghai Hongqiao International Airport.

A total of 93 people in close contact with the eight patients on flights have been screened and put under quarantine.

Shanghai saw no new indigenous COVID-19 infections on Thursday. The municipality has reported a total of 338 indigenous confirmed cases and zero suspected case.