HARBIN, April 8 (Xinhua) -- Northeast China's Heilongjiang Province reported 25 new confirmed COVID-19 cases from overseas Tuesday, the provincial health commission said Wednesday.

All the new confirmed cases were Chinese nationals returning from Russia, including four previously asymptomatic patients.

One imported COVID-19 case was discharged from hospital Tuesday after making a proper recovery, the commission said.

By midnight Tuesday, the province had reported a total of 87 imported confirmed COVID-19 cases. It has traced 1,015 close contacts, with 687 still under medical observation.

Meanwhile, Heilongjiang reported an increase of 86 imported asymptomatic patients from Russia on Tuesday, all of them Chinese nationals. By midnight Tuesday, the province had a total of 144 imported asymptomatic patients.