As the eight remain trapped for the fourth day, experts from the Geological Survey of India (GSI) and National Geographical Research Institute (NGRI) have been included in the rescue efforts, an official said on Tuesday.
Nagarkurnool District Collector B Santhosh on Tuesday said before taking any step forward stability of the tunnel has been taken into consideration even as dewatering is going on.
“As of now we are not able to communicate with them (trapped). We are taking the advice of the Geological survey of India and some other people. As of now we are dewatering and going forward. But for the last 40 or 50 meters we are not able to go. As of now we are taking the advice of GSI and NGRI. L& T experts have also come here,” the collector told PTI.
He said the teams were not able to go into the last fifty meters where the eight persons were trapped, due to accumulation of muck and debris.