Rescue operation in the Silkyara tunnel to evacuate workers was halted temporarily due to a snag with the auger drilling machine.​ Sources told TOI that the platform on which the auger machine has been mounted, got destabilised after developing some cracks. “Technical teams have been working non-stop to stabilise the 25-tonne platform on which the machine is mounted,” the sources said, adding that drilling is likely to start only after the platform is completely stabilised.