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”Vertical drilling has begun and (a stretch of) up to 15 metres has been drilled already,” NHIDCL MD Mahmood Ahmed told reporters in Silkyara.
If it does not face any hurdle, it will take nearly 100 hours to reach the trapped workers from the top of the hill above the tunnel.
Officials had earlier said rescuers have to drill down 86 metres from above.
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The removal of the shaft and fins of the auger machine stuck in the debris is underway with plasma and laser cutters inside the tunnel, state nodal officer for the rescue operations Neeraj Khairwal said.