How many people knew it was there before they blew up the entire port with it? Blowing it up certainly drew a lot of attention to both the ammonium nitrate, but

How many people knew it was there before they blew up the entire port with it? Blowing it up certainly drew a lot of attention to both the ammonium nitrate, but also all the corruption surrounding it. Incompetence is always a more likely cause for these things than conspiracy. Not only do we have a long record of this stuff being stored in poor condition, we would also have tons of people leaking about the planned detonation of it were it purposeful.