Using advanced technology, “signs of life” had been detected at three separate locations. A statement on Weibo from the Shenzhen municipal government said the landslide had also triggered an explosion at a nearby gas station. The Ministry of Land and Resources said Monday an initial investigation showed the landslide was caused by a mound of mud and construction waste rather than a natural disaster. A branch of PetroChina Co.’s East West Gas Pipeline linking Shenzhen with Guangzhou, which supplies southern China and Hong Kong with natural gas from Turkmenistan, leaked following the accident. Premier Li Keqiang ordered an official investigation into the disaster. China’s president, Xi Jinping, ordered provincial authorities to do everything possible to minimise casualties, treat the injured and comfort family members. Major landslides are not uncommon in China. Last month, 25 people were killed in a landslide in the eastern province of Zhejiang.