A worker cleans up the scene of an explosion at a residential building in Changchun, capital of Northeast China's Jilin province, June 28, 2010. The explosion occurred about 1:31 am on Monday morning, which left one person dead and six others injured. Rescue work was conducted immediately by the local fire department and the fire triggered by the explosion was put out by about 2:30 am. The cause of the explosion is still under investigation, according to reports.[Photo/Xinhua]