Asphyxiation and burn injuries could be the reason for the death of the labourers who were working in a tunnel under construction, which collapsed two days ago in Sikkim's Namchi district, indicated the postmortem report of one of the victims.
The body of one more worker was recovered from the NHPC Teesta Stage VI Hydropower Project tunnel on Wednesday during search operations, taking the number of bodies retrieved so far to 12, officials said.