Rescuers attempt to save 35 workers from a collapsed tunnel in the Indian Himalayas on Thursday with a large drill. The men have been held since Sunday after a devastating flood in Uttarakhand state.
The disaster killed at least 33 others. 171 people were reported missing. Most of the victims were employees of a hydroelectric power station and dam in the affected area. The two structures were destroyed after a wall of water crossed the valley on Sunday morning.
Workers trapped in the 2.5-kilometer tunnel also work for the hydropower plant. The army was deployed to clear the collapsed tunnel of debris, but after four days it only went 100 meters further. On Thursday, the rescue services will also try with an exercise.
Family members complain about the slow pace of the rescue operation and the lack of progress in the tunnel. In addition, there is uncertainty about the chances of survival of the men trapped in the mountain.
Indian authorities initially believed that a shattered glacier that had collapsed into a river caused the flooding. However, some scientists say it is more likely that the disaster was triggered by an avalanche.