Police said Thursday that at least seven people were killed and 60 injured in a huge black factional battle just two days after Nelson Mandela and other black leaders announced a cease-fire.

At least 150 houses were burned or damaged as rival groups fought with spears, knives and guns near Umgababa in Natal Province on the south-east coast late Wednesday, police said.Hundreds of people were involved in the clash between African National Congress supporters and rival Inkatha Freedom Party followers, they said.