Chinese authorities today said, no signs of life have been detected nearly 30 hours after a massive landslide buried 83 mine workers in Tibet despite a major search and rescue operation.

Officials of the regional government were quoted by the state-run Xinhua news agency as saying, the miners' survival chances were slim due to the scale of the landslide. Rescue work was continuing.

They said, as the site is at an altitude of more than 4,600 meters, most rescuers have been suffering from slight altitude sickness. And temperatures as low as minus three degrees Celsius have affected the sniffer dogs' senses of smell.

Chinese President Xi Jinping and Premier Li Keqiang have ordered all out efforts to rescue workers buried in the
landslide.