Officials said methane levels inside the tunnel remained high initially that rescuers were unable to reach the location

A suspected build-up of methane gas about 1.5 km inside the tunnel is believed to have exploded during a venting attempt, triggering a landslide that sealed the entrance.

Twelve workers are trapped in a Sikkim tunnel after a landslide, complicating rescue efforts due to a suspected gas leak.

Gangtok, Jul 21: Eight workers were killed after an under-construction tunnel of the NHPC Teesta Stage VI Hydroelectric Project collapsed in Sikkim’s Namchi district following a landslide, Chief Minister Prem Singh Tamang said on Tuesday. The tunnel at Samardung in Jholungey caved in on Monday after a landslide blocked its entrance, trapping around 27 workers […]

The workers were trapped at Mamring near Rangpo, where the Samardung tunnel is being constructed for the Teesta Stage VI Hydroelectric Project.

The workers were trapped at Mamring near Rangpo, where the Samardung tunnel is being constructed for the Teesta Stage VI Hydroelectric Project.

Officials said methane gas had reportedly accumulated around 1.5 kilometres inside the tunnel. An attempt to release the trapped gas is believed to have triggered an explosion, causing a landslide that sealed part of the tunnel and trapped the workers.

Eight workers died in a Sikkim tunnel collapse; rescue efforts hindered by gas leak, as PM Modi offers support.

Namchi (Sikkim) , July 21 (ANI): President Droupadi Murmu on Tuesday expressed deep sorrow over the loss of lives in the tunnel collapse incident in

Eight workers died in a Sikkim tunnel collapse; rescue efforts hindered by gas leak, as PM Modi offers support.