People sit on the steps of Morris Brown AME Church while services are held June 18, 2015 in Charleston, South Carolina. US police on Thursday arrested a 21-year-old white gunman suspected of killing nine people at a prayer meeting in one of the nation's oldest black churches in Charleston, an attack being probed as a hate crime. The shooting at the Emanuel African Methodist Episcopal Church in the southeastern US city was one of the worst attacks on a place of worship in the country in recent years, and comes at a time of lingering racial tensions. AFP PHOTO/BRENDAN SMIALOWSKI        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)