Apparently there was a secondary cache of fireworks stored next to the ammonium nitrate. Probably placed there under the assumption that if there's already an a

Apparently there was a secondary cache of fireworks stored next to the ammonium nitrate. Probably placed there under the assumption that if there's already an astronomic amount of explosive material they might as well store it in one place. Which completely overlooks the fact that the fireworks made a perfect primer for the detonation as ammonium nitrate is actually somewhat difficult to set off on its own. That's why we often see large amounts of it going off somewhere making the news every few years - it's misleadingly safe to store. Similarly, diesel won't catch a spark but I'm not going to advocate storing fireworks in a storehouse of the stuff.