A fire fighter searches for survivors at the blast accident scene at a restaurant in Shuozhou City, north China's Shanxi Province, June 19, 2013. Blasts ripped through a restaurant in Shuozhou Wednesday night, killing two people and injuring over 150 others. The explosion of natural gas pipes was suspected to be the cause of the accident after an initial investigation. (Xinhua/Lu Xiaoyu)

Fire fighters search for survivors at the blast accident scene at a restaurant in Shuozhou City, north China's Shanxi Province, June 20, 2013. Blasts ripped through a restaurant in Shuozhou Wednesday night, killing two people and injuring over 150 others. The explosion of natural gas pipes was suspected to be the cause of the accident after an initial investigation. (Xinhua/Yan Yan)

Photo taken on June 19, 2013 shows a damaged car near the blast accident scene at a restaurant in Shuozhou City, north China's Shanxi Province. Blasts ripped through a restaurant in Shuozhou Wednesday night, killing two people and injuring over 150 others. The explosion of natural gas pipes was suspected to be the cause of the accident after an initial investigation. (Xinhua/Lu Xiaoyu)

Medics treat a man injured in the restaurant blasts in Shuozhou City, north China's Shanxi Province, June 20, 2013. Blasts ripped through a restaurant in Shuozhou Wednesday night, killing two people and injuring over 150 others. The explosion of natural gas pipes was suspected to be the cause of the accident after an initial investigation. (Xinhua/Lu Xiaoyu)