As part of Unlock 4.0, Delhi Metro Rail Corporation (DMRC) began services on red, green and violet lines on September 10. <br />Passengers queued up to board metro trains at Kashmere Gate metro station. <br />Social distancing norms have been made mandatory on stations and trains in order to mitigate the spread of coronavirus. <br />Entire metro network will be made operational for passengers from September 12.