Rescuers are struggling to reach 12 workers trapped in a tunnel after an explosion at a hydropower project in northeastern India, which has already resulted in 13 fatalities.

The tunnel is a part of the National Hydroelectric Power Corporation’s (NHPC) Teesta Stage VI hydroelectric power project | India News

Incident occurred on Monday in Sikkim, where workers were constructing a tunnel for a state-run hydropower project; official says around 25-27 people trapped.