Workers excavating a tunnel in northern India scrambled out when it collapsed in this incredible video.<br /><br />The incident took place on a highway under construction on October 3 in Kullu district of Himachal Pradesh.<br /><br />Visuals show the moment the roof of a tunnel fell through, starting at first slowly but then in a matter of seconds the whole structure comes falling down.<br /><br />Workers can be seen running for their lives while others can be heard calling for the drilling equipment to be retrieved. <br /><br />There are no reported injuries as yet.
