Mumbai on Tuesday reported 4,758 fresh COVID-19 cases, taking the tally of infections to 4,09,320, the city civic body said, adding that the doubling rate of cases in the city has worsened to 50 days.

With 10 patients succumbing to the COVID-19 infection, the toll in the megapolis mounted to 11,671, a civic official said, adding that the city has witnessed 71 casualties since March 23.