Authorities announced a curfew for some black townships Friday and blamed rivalries among black opposition movements for fighting that has killed almost 1,700 people this year.

The African National Congress rejected the 9 p.m. to 4 a.m. curfew beginning Tuesday as "a return to the most barbaric form of repression."ANC leader Nelson Mandela, meanwhile, continued a reversal in policy by praising Inkatha leader Mangosuthu Buthelezi as a companion in efforts to halt the fighting.