As wiki would have us believe...
(On 4 August 2020, a large amount of ammonium nitrate stored at the port of the city of Beirut, the capital of Lebanon, exploded, causing at least 204 deaths, 6,500 injuries, and US$15 billion in property damage, and leaving an estimated 300,000 people homeless. Wikipedia)
Any thoughts?
I think it was a "Rod Of God" weapon, but I didn't really look into reason why it was used.