This picture taken on June 7, 2013 shows investigators at the scene of a bus that caught fire on the BRT (Bus Rapid Transit) elevated road in the city of Xiamen, China's southeast Fujian province. A fire that engulfed a commuter bus in minutes during rush hour in the Chinese city of Xiamen, killing 47 and injuring dozens more, appears to have been deliberately set, state media quoted investigators as saying on June 8.