Men wearing protective face masks catch fish along Tiber river, amid the spread of the coronavirus disease (COVID-19), in the inner city of Rome, Italy May 8, 2020. REUTERS/Remo Casilli

MILAN: The mayor of Milan issued a furious threat on Friday (May 8) to close down popular open spaces in the city after television footage showed crowds socialising and apparently ignoring public health rules aimed at preventing a resurgence of the coronavirus.