Rescue operation under way in India to save workers trapped after tunnel collapse

Entrance to Silkyara tunnel collapsed in early hours of Sunday with dozens of workers inside

A huge operation is under way to rescue 40 construction workers trapped after a tunnel partially collapsed in the Indian state of Uttarakhand.

The entrance to the Silkyara tunnel, which was under construction as part of a road project in Uttarkashi district, collapsed in the early hours of Sunday morning while dozens of workers were inside.