I didn’t see any “African American” victims. All three were white. Two were young people who worked for Kroger, and the third seemed to be somebody just crossing the parking lot and actually looked to me as if was possibly an older woman.
I don’t know if the store has released its security video yet.
3rd para in the excerpt:
WREG said a witness told the cameras that the three people injured were attacked indiscriminately—two victims were African American, and one victim was Caucasian.