A suspected gas explosion inside a hydropower project tunnel in northeast India has left at least 10 people dead, with 17 more still trapped, including rescue workers. The presence of toxic gases is severely complicating efforts to reach survivors. Main Developments The collapse occurred at a tunnel being constructed for a hydropower project, triggering a chain of events that has proven deadly. Rescue teams attempting to reach the trapped individuals have themselves become victims, underscoring the hazardous conditions. Read also: 3 reasons Argentina fans clashed with police after World Cup defeat Authorities are now grappling with the dual challenge of removing debris and neutralizing toxic fumes. The exact nature of the gases has not been publicly detailed, but they are impeding progress. Background Hydropower projects in India's mountainous northeast often involve tunneling through difficult geology, where gas pockets can accumulate. Similar incidents have occurred in the past, though this is one of the deadliest in recent memory. Rescue operations in such remote, rugged terrain are inherently slow, and the addition of toxic gases has turned a dangerous situation into a crisis. Why It Matters Each hour that passes reduces the likelihood of finding survivors, particularly for those trapped alongside hazardous gases. The incident also raises questions about safety protocols at large infrastructure projects in sensitive environments. What's Next Rescue teams will continue working to clear debris and ventilate the tunnel. Officials are expected to provide updates on the condition of those trapped and the status of gas mitigation efforts.