TULSA, Okla. (AP) - Workers on Tuesday began excavating remains of possible Tulsa Race Massacre victims, removing them from a cemetery where searchers so far have found 27 bodies, according to Oklahoma State Archaeologist Kary Stackelbeck."Today we have actually commenced with the process of excavating four individual burials," Stackelbeck said, while the search continues for additional remains.The 1921 massacre occurred when a white mob descended on the Black section of Tulsa — Greenwood — and burned more than 1,000 homes, looted hundreds of others and destroyed its thriving business district.