Joshi-Abhyankar serial murders
The Joshi-Abhyankar serial murders were ten murders committed by Rajendra Jakkal (25), Dilip Sutar (21), Shantaram Kanhoji Jagtap (23), and Munawar Harun Shah (21) of Pune, India, between January 1976 and March 1977. All the murderers were commercial art students at the Abhinav Kala Mahavidyalaya, Tilak Road, and were hanged for their crimes on 27 November 1983.
Source: Wikipedia — Joshi-Abhyankar serial murders (CC BY-SA 4.0)