India, Aug. 14 -- At least seven people were killed, and 14 others injured after a sudden surge of water and debris entered an under-construction tunnel at a hydropower project in Uttarakhand's Chamoli district on Thursday, according to media reports.

One worker remains trapped inside the tunnel following the incident, which occurred at a project site operated by Tehri Hydro Development Corporation Ltd. (THDC) in Pipalkoti.

The State Disaster Response Force (SDRF), National Disaster Response Force (NDRF) and other agencies were immediately deployed to carry out rescue operations. Efforts are continuing to locate and evacuate the trapped worker.

Rescue teams are using heavy machinery to clear the debris and drain water from the tunnel t...