A drone sprays disinfectants across the residential areas of Chennai during the 21-day nationwide lockdown PhotosGeneral By Pawan Last updated Apr 4, 2020 Chennai: A drone sprays disinfectants across the residential areas of Chennai during the 21-day nationwide lockdown (that entered the 10th day) imposed as a precautionary measure to contain the spread of coronavirus, on Apr 3, 2020. (Photo: IANS) Share FacebookTwitterLinkedinPinterestWhatsApp