Spencer, IA: (May 08, 2013) – The Texas State Fire Marshalâ€™s Office says a store of ammonium nitrate is what exploded April 17th at West Fertilizer Company, killing 14 people and injuring hundreds.
The finding was expected as officials had said they were focusing their investigation on the ammonium nitrate. Rachel Moreno, with the Texas State Fire Marshalâ€™s office, said a spot where the ammonium nitrate was stored is now a 90-foot wide crater.
However, the ignition source for the explosive chemical remains undetermined. Findings on the cause of the blast initially had been expected last Friday, but Moreno says the investigation will likely take another week or two to complete with dozens of investigators coming through the plant wreckage.