Thousands of pro-apartheid South African whites marched on government buildings Saturday demanding an election to test the popularity of President F.W. de Klerk's apartheid reform program.

Right-wing Conservative Party leader Andries Treurnicht told about 3,000 people gathered on the lawns below the Union Buildings that de Klerk had no mandate to scrap formal race segregation."De Klerk wants to be something for everyone, and ends up giving nothing to anyone," Treurnicht told the cheering crowd.

"De Klerk owes it to whites to hold a general election so that we have the opportunity to choose the leaders who will decide our future and negotiate with the leaders of other races," he said.

CP officials kept tight control of the march from the city center to the Union Buildings, which dominate a grassy rise at the edge of the business district.

They weeded out a number of overtly offensive anti-black posters, but others escaped their scrutiny.

Some marchers displayed the swastika-like emblems of white supremacist movements such as the Afrikaner Weerstandsbeweging (AWB-Afrikaner Resistance Movement) and the Boerestaat Party.

Both advocate the establishment of a whites-only state with the compulsory removal of blacks to quasi-independent tribal homelands.

In Johannesburg, shouts of "one settler, one bullet" rang out Saturday as about 3,000 blacks attended the funeral of Zeph Mothopeng, leader of the militant Pan Africanist Congress.

The black opposition group follows a more radical philosophy than the African National Congress and some other organizations. The phrase "one settler, one bullet," refers to killing whites.

Mothopeng, a popular anti-apartheid activist who was jailed several times for his activities, died last month at age 77 after a lengthy illness. He split from the ANC three decades ago to help form and later lead the Pan Africanist Congress, which refuses to recognize the white-led government and opposes sharing power.

Joe Slovo, leader of the South African Communist Party, and representatives of the Canadian, Swedish and British governments attended.