He said 19 of the 21 patients were domestic helps, drivers and security staff.
"House-helps work in different flats in the building and may have spread the infection. The entire building had to be sealed to break the chain of spread," Assistant Municipal Commissioner (D Ward) Prashant Gaikwad said.
"We have shifted the house-helps and security staff to quarantine centres and told the residential complex society to sanitise common toilets at least four to six times a day," he added.
Officials said the building is being sanitised and the residents screened. KK BNM BNM