He Jiansheng, vice president of Chengdu Public Security Bureau and deputy director of the technology team of the investigation team for the 6 * 5 bus burning accident reported the progress. After investigation, passengers on the bus said they smelled gasoline in the bus. No explosion traces were found on the bus. The middle and back part of the bus was burned severely.
Identities of 20 victims have been confirmed by DNA comparison, including 13 females and 7 males.
Gasoline components were detected in residuals at several places inside the coach. It could not rule out that the burning was caused by negligence or deliberate act. He Jiansheng said that it can be determined that someone brought flammable items onto the bus, but to determine who did this will take time. The bus door is located at the middle and back part of the bus. There is evidence proving that after the fire started, the driver tried to open the door manually.