In mid-August, he had undergone brain surgery in Delhi. He had also been suffering from coronavirus. Before his death, doctors declared his condition critical, and he was in a state of septic shock due to lung infection. 

His son Abhijit Mukherjee announced his death on Twitter with a message, “With a Heavy Heart, this is to inform you that my father Shri #PranabMukherjee has just passed away in spite of the best efforts of Doctors of RR Hospital & prayers, duas & prarthanas from people throughout India! I thank all of you.” 

https://twitter.com/ABHIJIT_LS/status/1300407074560471041

Pranab Mukherjee was elected as President of India in 2012-2017. He served as a Member of Parliament seven times in the cabinet of several Prime Ministers. 

Prime Minister of India, Narendra Modi, also Tweets about it with a short message, “India grieves the passing away of Bharat Ratna Shri Pranab Mukherjee. He has left an indelible mark on the development trajectory of our nation. A scholar par excellence, a towering statesman, he was admired across the political spectrum and by all sections of society.”