Poisonous gas delays rescue of 13 workers in India

A toxic gas explosion occurred inside a tunnel under construction as part of a hydropower project in the state of Sikkim, northeastern Himalayas, India, resulting in the deaths of 12 workers. Methane buildup caused the tunnel to collapse. The tunnel is located approximately 40 kilometers from the state capital, Gangtok. Rescue efforts have been hampered by the high gas levels and accumulated water, which prevented teams equipped with specialized breathing apparatus from entering. The area is seismically active and contains fragile rock formations that can develop cracks, trapping old gases and increasing the danger of tunnel projects in the region.

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