(LI HAIJUN)

Police officers inspect debris from a burnt-out bus in Chengdu, southwest China's Sichuan Province. The bus caught fire in morning traffic peak hour on June 5 in downtown Chengdu, in southwest China's Sichuan Province, killing 27 passengers and injuring 74 as of June 10.

Investigators announced at a press conference on June 7 that gasoline taken aboard by unidentified persons by accident or deliberately caused the blaze. They ruled out an explosion as the cause, saying no fragments of explosives had been found in the vehicle.