Two workers killed at recycling plant.

[jonpatterson]

No mention of war era is stated.

http://www.stltoday.com/news/local/metro/source-of-live-mortar-that-exploded-at-granite-city-recycling/article_94ab9b57-00fa-59c7-8d96-108a14652dd7.html

[CarlS]

Wow, that's very sad to hear.  The article is pretty devoid of facts but I did find a couple more at:
     http://www.ksdk.com/story/news/local/2014/08/25/totall-metal-recycling-explosion-granite-city/14557071/
     http://fox2now.com/2014/08/26/metal-recycling-plant-to-reopen-after-deadly-explosion/
It turns out they recycle many things including military ammunition so it sounds like it may be modern stuff.  I didn't find anything that stated exactly what they were.