President Thabo Mbeki wrapped up a tour of the opposition stronghold of KwaZulu-Natal on Saturday by warning that any violence around South Africa's coming elections would be stamped out. Fighting between activists from Mbeki's African National Congress (ANC) and the province's dominant Inkatha Freedom Party (IFP) killed 20,000 people in the 1980s, and after a decade of relative calm, tensions have risen since election campaigning began this month.