(Yicai Global) April 4 --Shanghai had dicovered three more imported novel coronavirus cases as of yesterday, taking the eastern metropolis' total confirmed Covid-19 cases to 529, the city's health commission said this morning.

All the new additions are Chinese citizens. Two arrived in Shanghai from the United States and the third one from the United Kindom, according to the commission.

Authorities have traced 20 people who had been in contact with the patients during their journeys and placed them under quarantine, it added.

Some 17 suspected cases, also involving people who have recently been overseas, are undergoing further tests.

The commission logged no new suspected or confirmed domestically transmitted cases yesterday. It also reported no asymptomatic cases under observation in the city yesterday.

Shanghai has confirmed 529 Covid-19 cases so far, including 190 from overseas. Some 169 of the patients who brought the virus into the city from outside China are being treated, with one in serious condition, and 21 have been discharged upon recovery.

Of the 339 local cases, six had died, five are in critical condition and one is stable. A total of 327 patients have fully recovered and been discharged from hospital, the commission said.