The NAACP warned black churches Tuesday to take "necessary precautions" as authorities in Southern states investigate whether several church fires over the last week were arsons.
Citing a series of arsons that struck black churches across the South in the 1990s, the NAACP used a hashtag that went viral this week and tweeted Tuesday, "Almost 20 years later, we must again ask, #WhoIsBurningBlackChurches?"
Hours later, another historically black church went up in flames.
Tuesday's fire at Mt. Zion African Methodist Episcopal Church in Greeleyville, S.C. -- about 60 miles north of Charleston -- comes 20 years after the same congregation's church was burned to the ground by men with ties to the Ku Klux Klan.