The National Disaster Management Authority (NDMA) announced on Friday that efforts to drill through the debris at the Silkyara tunnel in Uttarakhand, where 41 workers are trapped, have faced a setback. No further progress has been made since Thursday due to obstructions, prompting a temporary halt in the drilling process. However, the NDMA assured that repair work is underway to resume drilling using an auger machine in the near future.