On April 17, 2013, an ammonium nitrate explosion occurred at the West Fertilizer Company storage and distribution facility in West, Texas, United States, while emergency services personnel were responding to a fire there. Fifteen people were killed, over 160 injured, and more than 150 buildings damaged or destroyed. Investigators confirmed that ammonium nitrate was the material that exploded. On May 11, 2016, the Bureau of Alcohol, Tobacco, Firearms and Explosives stated that the fire was deliberately set. That finding has been disputed.