The site of a residential building explosion is seen in Dalian City, northeast China's Liaoning Province, May 16, 2011. The accident, due to the blast of the bottled LPG, occurred at around 7:10 a.m. at a third floor apartment in the Nahua Street of Ganjingzi District in Dalian, leaving at least one person dead and three others injured. [Xinhua/Xu Dewu]