Khanda, who was associated with the Shiromani Akali Dal Amritsar, was admitted to the hospital on Monday. While the exact cause of his death is not yet clear, some reports suggested food poisoning, while others claimed he succumbed to blood cancer.
The controversial operation had far-reaching consequences and was followed by the assassination of then prime minister Indira Gandhi, and the massacre of Sikhs in Delhi.
The Growing Threat Of Amritpal Singh Sandhu and The Revival Of The Khalistan Movement swarajyamag.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from swarajyamag.com Daily Mail and Mail on Sunday newspapers.
Central and state security agencies are keeping an eye on developments surrounding Amritpal Singh, appointed head of Waris Punjab De organisation, which was founded by late Deep Sidhu.