SEOUL, South Korea — South Korea has reported 19 new cases of the coronavirus, most from the densely populated Seoul metropolitan area, where officials have been actively tracing transmissions linked to nightclubs and other entertainment venues.

South Korea’s Centers for Disease Control and Prevention on Tuesday also reported two more deaths, bringing national totals to 11,225 cases and 269 fatalities. Officials linked three of the new cases to international arrivals.

South Korea has been reporting around 20 new cases per day over the past two weeks after health workers found hundreds of infections linked to club goers who went out in early May as the country eased social distancing measures.

The new infections in the greater capital area have caused concern as authorities proceed with a phased reopening of schools, which began with high school seniors last week.

Around 2.4 million high school juniors, middle school seniors, first and second graders and kindergarten students will be returning to school on Wednesday.

Health Minister Park Neung-hoo urged school officials to double check their preventive measures. He called for authorities to strengthen monitoring on some 390,000 undocumented foreign nationals who may have poor access to medical services and tests, but related measures weren’t immediately announced.

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BEIJING — China reported seven new coronavirus cases Tuesday, all brought into the country by Chinese citizens returning from abroad.

Just 81 patients remain hospitalized with COVID-19, and another 408 are in isolation and being monitored for either suspected cases or after testing positive for the virus without showing any symptoms. China has reported a total of 4,634 deaths from the disease among 82,992 cases.

With the decline in numbers, students have gradually returned to class and some international schools in the capital Beijing are preparing to re-open on June 1. China is proceeding this week with the annual session of its ceremonial parliament, which is being held under social distancing restrictions.