Zimbabwe ? With violence continuing against opposition activists, Zimbabwe opposition leader Morgan Tsvangirai said Wednesday that he would not negotiate with the ruling party of President Robert Mugabe on a government of national unity.

Tsvangirai also rejected participating in talks mediated by South African President Thabo Mbeki and sharply criticized the African Union for not supporting the findings of African election observers that Friday’s presidential runoff vote was not democratic.

The opposition Movement for Democratic Change is angry over what it sees as assurances by South Africa to African leaders that a deal on a government of national unity is imminent, when talks on the issue have not begun. It sees Mbeki, who has avoided strong criticism of Mugabe, as compromised and biased toward the longtime president, who was inaugurated to a new term Sunday after a vote tainted by Tsvangirai’s violence-based decision to withdraw.

Tsvangirai said nine opposition activists have been killed since the runoff election, increasing the death toll from political violence to 95.