Key facts
- At least 22 workers have died in a tunnel collapse at an under-construction hydroelectric project in India's Sikkim state.
- The incident is suspected to have been caused by a methane gas explosion.
- 25 workers were initially trapped in the tunnel; two escaped, and 22 bodies have been recovered.
- Rescue operations are ongoing for any remaining victims.
- The National Hydroelectric Power Corporation (NHPC) is developing the project.
At least 22 workers have died following a suspected methane gas explosion and tunnel collapse at an under-construction hydroelectric project in India's northeastern state of Sikkim. The incident occurred on Monday at a project on the Teesta river, developed by state-owned National Hydroelectric Power Corp Ltd (NHPC).