HARBIN, April 16 (Xinhua) -- Northeast China's Heilongjiang Province on Wednesday reported four new confirmed COVID-19 cases transmitted locally and 16 new confirmed cases from overseas, the provincial health commission said Thursday.

All the new imported cases were Chinese nationals returning from Russia. Of them, two were previously asymptomatic cases, according to the commission.

By Wednesday, the province had reported a total of 356 confirmed imported COVID-19 cases. It had traced 2,089 close contacts, with 1,336 still under medical observation.

On Wednesday, Heilongjiang reported a new imported asymptomatic case. The province had a total of 50 imported asymptomatic cases by Wednesday.  ■