Photo taken on Aug. 15, 2015 shows a scene of the warehouse explosion site in Tianjin, north China. Forty-six people have been rescued from the Tianjin blasts site, according to the fifth press conference on the explosion Saturday afternoon. (CNS photo/Tong Yu)
The Tianjin warehouse explosions in August that killed at least 165 people were caused by ignition of hazardous materials, improperly or illegally stored at the site.
The fire first started in a container through auto-ignition of nitro-cotton, due to vaporization of the wetting agent in hot weather. The fire spread, igniting other chemicals, including ammonium nitrate, according to a report issued on Friday by a State Council investigation team.
