[3] The number of casualties was aggravated by the rear door not opening and firefighters and other emergency service crews being blocked 1 km from the scene by bad traffic.
The exact cause of the fire was not immediately known by officials,[4] but the diesel engines were intact, and authorities quickly ruled out a mechanical glitch.
[7] The arsonist was later identified as 62-year-old unemployed Zhang Yunliang (张云良), a native of Suzhou, Jiangsu, who temporarily lived in Chengdu.
"[14] A bus company in Chengdu promised to financially reward passengers who report others who bring flammable liquids or other prohibited items on board.
[2] The municipal governments of Beijing, Shenyang, and Guangzhou reacted by reviewing bus safety measures.