Hyderabad, Feb. 25 -- The National Disaster Response Force (NDRF), on Tuesday, February 25, deployed sniffer dogs into service in the rescue mission of the eight workers trapped in the Srisailam Left Bank Canal (SLBC) for the fourth day after the roof collapsed on February 22.

The trained rescue dogs entered the tunnel along with NDRF and SDRF teams to identify and locate the trapped workers.

Earlier, the Telangana government roped in experts from the Geological Survey of India and National Geographical Research Institute besides an Australian part of L&T with vast experience in tunnels and rescue operations to suggest the way forward regarding the rescue.

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