Former President Pranab Mukherjee on Monday underwent brain surgery to remove a clot at the Army Research & Referral Hospital and is on ventilator support after the procedure, sources said. Prior to his surgery, Mukherjee, 84, had also tested positive for coronavirus.

"On a visit to the hospital for a separate procedure, I have tested positive for COVID19 today. I request the people who came in contact with me in the last week, to please self isolate and get tested for COVID-19," he had tweeted earlier on Monday.

After a long political career in which he held several top posts including that of finance and defence minister, Mukherjee became President of India in 2012 and served till 2017. (IANS)