There were a lot of ammo cans, some containing loaded ammo and some containing primers.What did happen?
Due to the nature of the fire it was hard to tell which ammo can was which afterwards.
The cans all popped open. There were a few cans with some obvious holes in them, but most were open and empty. What specifically caused the holes I do not know. This was a shop containing thousands of primers and tens of thousands of rounds of ammo. There were zero explosions.