Blast in Indian Himalayan Tunnel Kills 12 Workers

Rescue efforts are facing severe challenges from gas and water accumulation as teams attempt to reach workers trapped inside a tunnel at the Teesta Stage VI hydropower project in India's northeastern Sikkim state. The suspected methane gas explosion on Monday has resulted in the deaths of at least 12 individuals, with 13 still unaccounted for, according to the Associated Press.

The blast occurred in a tunnel under construction for the 500-megawatt project in the Samardung area of Namchi District. While officials suspect methane buildup, a technical investigation is pending to determine the exact cause. The explosion damaged the tunnel structure and filled it with thick smoke. National Disaster Response Force (NDRF) personnel detected methane, carbon monoxide, and hydrogen sulfide, creating a hazardous environment.

Rescuers, equipped with breathing apparatus and night vision devices, are struggling to navigate the dangerous conditions. They can only spend about 15 minutes in the accident zone per shift due to the toxic gas levels and continuous water ingress. "The conditions are very dangerous," an official stated, highlighting the difficulties in reaching the victims.

Twenty-one workers were reportedly inside the tunnel when the explosion happened. Two managed to escape, and six company officials who entered to assist in the rescue also became trapped. A surviving worker, Gandura Oraon, recounted hearing a loud noise before materials began to fall, prompting workers to flee. Oraon and others found a food delivery vehicle, which they used to exit the tunnel.

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The conditions are very dangerous.