The opposition's pullout from Friday's vote raises pressure on Zimbabwe's leader.
President Mbeki says end 'attacks against Africans' and welcome them back home. But a police raid on a transit camp sends another message.
The international community seeks to influence the Mugabe government as Army leaders orchestrate political attacks.
Church and community centers have been providing refuge for tens of thousands fleeing recent anti-immigrant violence.
Police, Army begin joint operations in Johannesburg in try to quell the attacks, which have left 42 dead.
Opposition leader Morgan Tsvangirai was invited for talks with President Robert Mugabe, says a top official. Would the talks negate a runoff presidential election scheduled for June 27.