Metro train services can resume in a phased manner from September 7 and lockdowns can't be imposed outside containment zones, the central government said on Saturday as it announced new steps to ease COVID-19 restrictions as part of the fourth phase of unlocking. Social, political, academic, sports, religious and other functions will be allowed with a limit of 100 people as part of the new rules from September 21. Schools, colleges, swimming pools and indoor theatres will remain closed. This phase, called "Unlock 4", will be in effect till September 30.