A fire set by arsonists severely damaged the Pretoria headquarters of South Africa’s Roman Catholic Church, a staunch opponent of apartheid. No one was injured in the pre-dawn incident. It was the second major attack in six weeks on offices of an anti-apartheid church organization. On Aug. 31, the headquarters of the South African Council of Churches in Johannesburg was wrecked by a bomb. South Africa’s Catholic Church is predominantly black. Conservative white Catholics have complained about the militant anti-apartheid stance of the Southern African Catholic Bishops Conference.