CNN:
That is 15 new burials since the 12 that were uncovered in October, according to Oklahoma state archaeologist Kary Stackelbeck.
Stackelbeck expects that more graves will be uncovered as the excavation moves west, but says that some of these deaths may be associated with the 1918-1919 flu pandemic.
“So we have to remain cautious and not get too ahead of ourselves in terms of our interpretations. So we’re working with our multiple hypotheses about what can explain the presence of a mass grave,” she said, adding that the graves from the massacre is “absolutely still a possible scenario.”