Mumbai, April 12 : Mumbai recorded the highest single day deaths of 16 Covid-19 patients, shooting the city's total casualties to 91, a BrihanMumbai Municipal Corporation official said on Sunday. Among today's victims are 6 females and 10 males and most had other major diseases such as diabetes, hypertension, heart problems, among others, while only one succumbed to age-related issues. Mumbai also recorded 217 new Covid-19 positive cases, taking the number of total infectees to 1399, said the BMC. This included 43 new cases in Dharavi -- Asia' biggest slum, which recorded 15 new cases today and has reported at least 4 deaths so far. With the incidence increasing in Dharavi, the police, civic, and health authorities are working overtime to implement lockdown in the 2.25 sq.km Dharavi area housing nearly 800,000 people. The adjacent Dadar area, a mix of middle and upper-middle class with a few posh pockets, also recorded 13 new cases since last night, causing fresh concerns. Besides 217 in Mumbai, fresh cases have been detected in other parts of the state, details of which are awaited, even as the state government has extended the lockout till April 30. /IANS