Chinese construction crews building Tibet's first railway have completed a three-kilometer tunnel through a mountain at an altitude of more than 42-hundred meters.
The official news agency, Xinhua, says work on the Yangbajain tunnel, 80-kilometers north of the Tibetan capital, Lhasa, was finished on Sunday. Xinhua says it is longer than any other tunnel built above four thousand meters in China.
Begun in the middle of 2001, the Tibet railway will stretch more than 11-hundred kilometers from neighboring Qinghai province all the way to Lhasa. Xinhua says it will be the longest and highest railway in the world.
The news agency says all seven major railway tunnels on the line are now complete.
Some information for this report provided by AP and fbis.