The race to rescue 40 trapped construction workers in a collapsed highway tunnel in India has become crucial as it reaches its sixth day, with police confirming the operation is "at full speed". Rescuers used new equipment to drill deeper into the debris of Silkyara tunnel to fix wide pipes for the workers to crawl to their freedom. Report by Bangurak. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
