That's neat. I just saw this:

“If you look at the video (of the Beirut explosion), you saw the black smoke, you saw the red smoke, that was an incomplete reaction,” she said.

“I am assuming that there was a small explosion that instigated the reaction of the ammonium nitrate — whether that small explosion was an accident or something on purpose I haven’t heard yet.”

• Jimmie Oxley, chemistry professor at the University of Rhode Island.

Hopefully, legit info will come out as time progresses.