VENTERSDORP, South Africa – A top member of a South African white supremacist group says the slaying of their leader is "a declaration of war" by blacks against whites.

Andre Visagie also vowed Sunday to avenge the death of Eugene Terreblanche and says his group will warn soccer teams to avoid the 2010 World Cup in South Africa. He did not specify what form the vengeance will take.

Terreblanche led the Afrikaner Weerstandsbeweging movement, which wanted to create three all-white republics that would only allow blacks as guest workers.

Police said he was bludgeoned to death Saturday by two of his farm workers over wages. Terreblanche's followers on Sunday blamed a fiery youth leader for spreading hate speech that led to his killing, a charge the youth leader denied.