At least 52 people have been killed during some of the bloodiest clashes in months between the African National Congress and the rival Inkatha Party, police said Monday.

At least 29 people were killed in violence since Sunday, mostly in black townships around Johannesburg, police said in a statement. The deaths raised the weekend death toll to at least 52, they said.The ANC, meanwhile, rejected suggestions that Nelson Mandela and other ANC leaders might join the Cabinet to end a mounting political crisis between the government and the black opposition group.