ammonium nitrate

Findings inconclusive in Texas plant blast investigation: authorities

May 17, 2013 by Nomaan Merchant, The Associated Press

Criminal activity not ruled out; investigators narrow down number of potential causes to three

Criminal investigation underway in Texas fertilizer plant explosion

May 13, 2013 by Angela K. Brown And Ramit Plushnick-Masti, The Associated Press

Officials yet to link medic’s arrest with April 17 fire and blast at West Fertilizer Co.

Ammonium nitrate culprit in West Texas plant blast

May 7, 2013 by The Associated Press

A spot where the chemical was stored is now a 27.5-metre crater