A mass rescue operation is underway in southern Yunnan Province following the collapse of a rail tunnel which has left 15 workers trapped behind tonnes of rocks.
A section of tunnel about 4-kilometers from the enterance collapsed yesterday afternoon.
Officials on the scene say its unclear if any of the 15 workers have survived.
More than 400 people have been dispatched to the site of the collapse in Funning county, which is located on Yunnan's southeast border with Guangxi.
The tunnel itself is part of a 700-kilometer rail line linking Yunnan's capital, Kunming, with Guangxi's capital, Nanning.
Construction of the line began in 2009, and was due to be finished in 2016.
