Photo/Illutration The Tokyo metropolitan government building in Shinjuku Ward is lit up in red to signify a “Tokyo Alert” on June 2, as fears rise of a second wave of COVID-19 infections. (Kazuhiro Nagashima)

Tokyo confirmed 18 new COVID-19 cases on June 10, the fourth straight day the daily tally fell below 20 in the capital, sources said.

The Tokyo metropolitan government issued a “Tokyo Alert” on June 2, about a week after the state of emergency was lifted for the capital, urging residents to remain vigilant against a possible second wave of infections.