Photo taken on Feb. 27, 2013 shows the Qinji Elementary School, where a stampede accident took place, in Xueji County of Xiangyang, central China's Hubei Province. Four students were killed in a stampede accident here on Wednesday morning. Relevant departments of Xiangyang have rushed to the scene to carry out rescue efforts, and the injured have been sent to hospital for treatment. The cause of the accident is under investigation. Photo: Xinhua

Two students stand by the scene of a stampede accident at the Qinji Elementary School in Xueji County of Xiangyang, central China's Hubei Province, Feb. 27, 2013. Photo: Xinhua

Zhang Jiali, who was injured in a stampede accident that took place at the Qinji Elementary School, receives medical treatment in a hospital in Laohekou City of Xiangyang, central China's Hubei Province, Feb. 27, 2013. Photo: Xinhua

A student stands by the scene of a stampede accident at the Qinji Elementary School in Xueji County of Xiangyang, central China's Hubei Province, Feb. 27, 2013. Photo: Xinhua

Photo taken on Feb. 27, 2013 shows the scene of a stampede accident at the Qinji Elementary School in Xueji County of Xiangyang, central China's Hubei Province. Photo: Xinhua