Dehradun, Aug. 13 -- Rescue operations are currently underway at an under-construction THDC project tunnel near Pipalkoti in Uttarakhand's Chamoli district, following a sudden influx of mud, debris, and water, resulting in the deaths of four of the 22 workers.

The incident occurred after a landslide-like event near the Birhi River sent a heavy surge of water and debris into the tunnel, trapping workers who were on duty. Out of the 22 individuals inside at the time, 18 workers have been safely rescued, while four were found dead in the incident, the NDRF team commander, Amrit Lal Meena, said.

Uttarakhand Chief Minister Pushkar Singh Dhami, who is monitoring the situation from the State Disaster Management Authority office in Dehradun, sa...