Two of the three workers trapped inside a collapsed tunnel in Himachal Pradesh's Bilaspur district were reportedly rescued by a team of National Disaster Response Force (NDRF) on Monday, nine days after the incident.

Amid cheers, Mani Ram and Satish Tomar were taken out of the under-construction Tunnel No 4 of the Kiratpur-Nerchowk four-lane project that had caved in on 12 September.

The third worker, Hriday Ram, who was among a group of 20 labourers of the Himalayan Construction Company working at the tunnel site, is yet to be traced.

"The rescue operation will continue till the third person is traceable," the Business Standard quoted DD Sharma, special secretary (Disaster Management and Revenue) as saying.

NDRF Director General OP Singh said the rescue team is trying to remove the debris as they suspect that the third worker is trapped under the boulders.

The trapped labourers reportedly survived on dry fruits, biscuits and water supplied by the rescue team through a pipe.

The NDRF team along with National Disaster Management Authority (NDMA) had started drilling the collapsed tunnel three days ago and completed the work on Monday morning.