Debris is scattered after an explosion at a construction site near a dormitory building on the campus of Lanzhou University in Lanzhou city, Northwest China’s Gansu province, July 20, 2015. Seventeen people, including 15 students, were injured in the explosion, and all the injuries were caused by glass pieces produced by the blast. The cause of the accident is being investigated. (Photo: China News Service/Nanru Zhuoma)
