Since the June 17 killing of nine people at Emanuel African Methodist Episcopal Church in Charleston, S.C., six predominantly black churches in the South have burned in the past week, including one on Tuesday, causing many on social media to wonder #WhoIsBurningBlackChurches. (Fires have also hit two other churches—College Heights Baptist Church in Ohio and Fruitland Presbyterian Church in Tennessee—but neither is predominantly black.) As of right now, three fires at black churches in three states—Tennessee, Georgia and North Carolina—have been confirmed as arson. Three other church fires are under investigation. Here’s what we know so far: