Mumbai, April 4 -- Amid reports of three persons testing positive for Covid-19 in Mumbai's Dharavi slum, authorities are having sleepless night over a possible explosion of Covid-19 in Asia's largest slum, which is also the most densely populated place in the world.

Of the three cases reported from Dharavi, one is a 56-year-old man with no history of international travel - who tested positive for coronavirus on Wednesday and passed away. The second one is a 52-year-old sanitation department worker of the Brihanmumbai Municipal Corporation (BMC). The third one is a 35-year-old doctor who practises near the slum.

The 56-year-old man who died on Wednesday night was the first to test positive from the sprawling shanty town in India's financ...