Mumbai,  The Covid-19 death toll in Maharashtra shot up from 16 to 19 even as the number of positive cases rose to 416 on Thursday, officials said here.

The 81 new cases registered included 57 from Mumbai, nine each from Pune and Ahmednagar, five in Thane and one in Buldhana, with the positive cases crossing the 400 mark in less than 24 hours from 335 on Wednesday.

Details of the new fatalities are awaited, said officials.

On the other hand, 42 persons have fully recovered in the state and have been discharged from hospitals.

The city's worst nightmare came true when at least two Covid-19 cases were reported from Dharavi - notorious as Asia's biggest slum and world's most congested district - in central Mumbai.

While a 53-year old man with no history of foreign travel has reportedly succumbed in a government hospital late on Wednesday, a 51-year old civic sanitation employee was found positive on Thursday, sending shockwaves throughout Dharavi.

Moving swiftly, the Municipal Corporation of Greater Mumbai (MCGM), with a police team, promptly sealed off the entire building No. 9 in Punjabi Camp, Sion-Koliwada area amidst howls of protests and abuses.

Officials have so far chosen to officially play down the incidents and are not confirming the death of the 53-year old man ostensibly to prevent panic in Dharavi.

In another cause for concern, Health Minister Rajesh Tope announced that 1,400 persons who had attended the Tablighi Jamaat event in Delhi last month have been identified and process is on to track and quarantine them.

So far, around the test results of 46 persons who returned from the event have proved negative and the reports of the remaining 3 are awaited.

Besides, more than 200, including several foreigners, in different parts of the state are already under quarantine with complete protocols implemented.

The MCGM has also released a list of all its containment (quarantine) areas in the city to help the people and avoid these localities where either Covid-19 patients have been found or suspects are kept in isolation.

They include several residential complexes across the city which are now sealed with entry-exit barred for all till the isolation periods are over, while the civic body is fumigating various localities and housing complexes around Mumbai.

The state government has now opened around 3,500 temporary camps for housing migrant labourers across the state where they are getting food, accommodation and other basic needs till the lockdown period is over.

Early on Thursday, police detained around 325 migrants who attempted to sneak out of Maharashtra in container trucks to Rajasthan and further investigations are on.