Balimela reservoir boat attack
The Balimela reservoir boat attack occurred on 29 June 2008 when Communist Party of India (Maoist) forces ambushed a boat on the Balimela Reservoir in Odisha, India carrying 60 Greyhounds commandos, 5 police officers, and a boat operator. The boat sunk, killing 38 people, while 27 survived.
Source: Wikipedia — Balimela reservoir boat attack (CC BY-SA 4.0)