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In a significant development, a team of experts engaged in rescuing the eight persons who have remained trapped for the past five days in the partially collapsed Srisailam Left Bank Canal (SLBC) tunnel were able to reach the end of the tunnel and return, a senior police official said on Wednesday.
The teams so far were able to reach up to 50 meters before the end of the tunnel only due to muck and debris.
"A 20 member team comprising NDRF (National Disaster Response Force), SDRF (State Disaster Response Force) and Rat Miners were able to reach the last points of the (tunnel). But there was a lot of debris. They are working out how to go about," Nagarkurnool Superintendent of Police Vaibhav Gaikwad told PTI.
"One day before they were able to reach up to 40 meters (before the end of the tunnel). Yesterday they reached (crossed) that 40 meters also," the official further said.
Gaikwad further said the team searched at the location but could not find anything last night.
Replying to a query, he said the Geological Survey of India team which has collected samples is yet to submit its reports on soil strength and others.
Top experts from the Indian Army, Navy, NDRF, GSI and other agencies who are making relentless efforts to find a breakthrough in the collapsed SLBC tunnel rescue work amidst threat to the lives of rescuers' with the continuous flow of silt and water, are set to continue their operations on Wednesday.
Addressing media persons, Irrigation Minister Uttam Kumar Reddy on Tuesday cited experts, who described this as the most complex and difficult tunnel rescue operation in the world or at least in India as there is only one entry or exit to the SLBC tunnel.
There was no contact with the trapped persons though oxygen is being pumped into the tunnel continuously, the minister had said.
Eight personnel working on the SLBC tunnel project were trapped after a portion of the tunnel collapsed on February 22.