New Delhi, May 28: The New Delhi Municipal Council (NDMC) sealed its headquarter building in Central Delhi on Thursday after a senior employee tested positive for COVID-19, taking the total number of employees infected with the novel coronavirus to 7.

"A Joint Director level employee has been found positive for COVID-19. Three more employees were found yesterday. Contact tracing is being done by district authorities as per protocol. The building has been sealed. A  disinfection drive will be carried out," a senior NDMC official said. India Reports 6,566 New COVID-19 Cases, 194 Deaths in Past 24 Hours; Total Count Reaches 1,58,333, Death Toll Crosses 4,500-Mark.

"Meanwhile, all employees will be working from home till building premises completely sanitised and reopened," the official added. Three employees of the NDMC had tested positive for COVID-19 on Wednesday, prompting the civic body to seal a floor of its headquarters in Lutyen's Delhi and a section of another building housing its office in Gole Market. US Becomes World's First Country to Cross 100,000 COVID-19 Deaths, Cases Top 1.7 Million.

Earlier three employees of the NDMC, including a sanitation worker and engineer, had tested positive for COVID-19. Last week, a doctor at an NDMC dispensary had tested positive for COVID-19, following which the premises of the health facility was sealed.