Injured passengers receive medical treatment in a hospital in Ningxian County of Qingyang City in northwest China's Gansu Province, Feb. 2, 2013. An overloaded bus caught fire after falling into a ravine here on Friday. Eighteen people have been confirmed dead and 34 others injured in the accident after more bodies were recovered from the wreckage, government sources said Saturday. (Xinhua/Nie Jianjiang)

A four-year-old boy (front) who survived the bus crash receives medical treatment in a hospital in Ningxian County of Qingyang City in northwest China's Gansu Province, Feb. 2, 2013. An overloaded bus caught fire after falling into a ravine here on Friday. Eighteen people have been confirmed dead and 34 others injured in the accident after more bodies were recovered from the wreckage, government sources said Saturday. (Xinhua/Nie Jianjiang)

Injured passengers receive medical treatment in a hospital in Ningxian County of Qingyang City in northwest China's Gansu Province, Feb. 2, 2013. An overloaded bus caught fire after falling into a ravine here on Friday. Eighteen people have been confirmed dead and 34 others injured in the accident after more bodies were recovered from the wreckage, government sources said Saturday. (Xinhua/Nie Jianjiang)