A devastating explosion occurred at a hydroelectric project in Sikkim on Tuesday, resulting in at least 10 confirmed deaths and leaving 15 workers trapped underground. The incident took place at the National Hydroelectric Power Corporation (NHPC) site along the Teesta River in Samardung village. Officials believe the blast was triggered by a sudden release of methane gas embedded within the tunnel's rock formations, which unleashed a cloud of toxic fumes and obstructed rescue efforts.

State disaster management authorities have expressed concern over the slim survival prospects for those still missing, as emergency responders struggle to navigate the hazardous, gas-filled environment. While the NHPC reported that at least 25 individuals were initially caught in the blast, recovery teams are working under difficult conditions to reach those remaining. Images released by local government officials show rescue crews utilizing specialized gear, including oxygen tanks and ropes, in a desperate attempt to secure the site and locate the missing workers.