What happened is terrible.
While it has been most likely it has been an accident provoked probably by poor practices and bribes, the story that is ammonium nitrate is a cover up.
- Ammonium nitrate explosions are yellow, not orange
- the building was not large enough to store the required quantity (Olympic size swimming pool)
Most likely it was a cargo of missile stored for delivery probably from Iran to the Syrian government.
Sources say that there was welding work going on.
investorpolitico 