Photo/Illutration The Tokyo metropolitan government building in the capital’s Shinjuku Ward (Asahi Shimbun file photo)

Tokyo posted 3,317 fresh cases of COVID-19 on May 22, down 31 from the previous Sunday.

Metropolitan government health officials confirmed six related deaths the same day among patients in their 70s to 90s.

The seven-day average of new cases over the week through May 22 was 3,560.1, or 90 percent of the figure for the preceding week.

The number of serious cases in the capital stood at three, unchanged from the day before. Authorities in Tokyo define serious cases as those involving patients on a ventilator or ECMO lung bypass machine.