NEW DELHI: India’s Covid-19 death toll crossed the 100-mark and reached 124 on Sunday night after registering 27 fresh deaths — the highest single-day casualty since the outbreak — in the last 24 hours. With 13 deaths, the toll in Maharashtra , the worst affected state, stood at 45 – which is 36% of the nation’s casualties.For the fourth consecutive day on Sunday, India registered an increase of 500-plus cases. With 553 news cases, the total number of cases has crossed the 4000-mark at 4218. Maharashtra tops the chart with 748 cases, 113 of which were reported on Sunday. Mumbai is the worst affected with 30 of the 45 deaths in Maharashtra coming from there.Mumbai also accounts for 60% or 458 cases in the state. It also recorded eight new deaths, majority of who were above the age of 55 years and had underlying health conditions. After Maharashtra, Tamil Nadu reported the highest number of positive cases, 86, taking the total to 571. Delhi continues to be the third worst affected state with 58 fresh cases on Sunday, taking the total to 503.Though the toll collated from different states stands at 124, the health ministry has confirmed only 84 deaths and 3,577 positive cases. Lav Agarwal, joint secretary in the health ministry, said the rate of doubling of Covid-19 cases at present is 4.1 days. If the absence of a sudden spurt in cases owing to Tablighi Jamaat delegates testing positive, this would have been 7.4 days.