Here's the Yahoo News report from Raquel Maria Dillon:
Yahoo News stories have short lifespans so here, in case it helps anyone referring back to this news item later, is the Huffington Post link to the same article:
Madeleine Morgenstern has more, although as an editor I think her and Dillon's wordings are too much alike. Reading these two articles feels a bit like the way "scholars" read the Gospels: I don't know which version was written first or whether both cite a common source, but in the twenty-first century I think at least one of them should have used proper citation etiquette...
Anyway, the funny thing is that although the robbers apparently had guns, they didn't shoot. Maybe they didn't have bullets. Likely, if anyone in the store had been armed, the robbers would not have been able to hurt law-abiding people...which they did. Lack of one specific weapon does not make violent people less violent. Our bare hands, not even to mention our reinforced feet, are deadly weapons if used as such.