Bhagat Singh, along with Shivaram Rajguru, assassinated British police officer J.P. Saunders in Lahore on December 17, 1928, to avenge the death of nationalist leader Lala Lajpat Rai. This was part of the Lahore Conspiracy Case. At the time, Lahore was part of British India; after partition in 1947, it became part of Pakistan. Karachi, Attari, and Islamabad are incorrect locations for this historical event.