Minutes too late

Feel free to interpret this picture however you like, but I intended it to seem like the woman on the left got back to her hometown (or refugee camp or whatever) just a few minutes too late to prevent everyone in it from getting massacred by someone or something.

Please note the bloodstain on the window behind all the smoke, as well as the explosive barrel on the left. Also note that two of the corpses are holding each other's hands. I wanted it to seem dramatic.

Anyway, in case you desperately want an explanation for who killed everyone, here is a picture I made in less than five minutes:

Addon used:
rp_apocalypse