An explosion occurs inside a tunnel at an Indian hydropower project, killing at least 10 people and leaving many others missing, according to multiple reports. Survivors and witnesses tell authorities they hear a loud blast and then see debris fall and crash through the tunnel, trapping workers inside.

Counts reported by different outlets vary slightly as rescue and recovery efforts continue: one report cites 11 deaths and 14 missing, another cites 12 deaths and 13 missing, and a third cites 10 deaths and 17 missing. The differences reflect ongoing operations and updates as authorities account for casualties.

Emergency response teams search for trapped workers and work to clear the tunnel, while investigators assess what caused the blast. Authorities rely on survivor accounts and on-site evidence to determine the circumstances leading to the explosion. No additional details about the cause of the incident are provided in the excerpts, but all sources describe the blast occurring in the hydropower project tunnel and causing immediate structural disruption that prevents quick escape.