Indian revolutionaries Bhagat Singh, Sukhdev Thapar and Shivaram Rajguru were hanged on March 23, 1931, in the Lahore jail against the scheduled execution on March 24. They were sentenced to death in the Lahore conspiracy case wherein they were found guilty of murdering senior British police officer John Saunders. This day is marked as Shaheed Diwas (Martyrs' Day) in India.