Earlier, Zimbabwean opposition leader Morgan Tsvangirai urged the United Nations to isolate President Robert Mugabe and said a peacekeeping force was needed in Zimbabwe.
Mugabe has shrugged off Monday's unprecedented and unanimous decision by the United Nations Security Council to condemn violence against the opposition and declare that a free and fair presidential election on Friday was impossible.
The meeting in Swaziland's capital Mbabane has been called by the leading regional body, the Southern African Development Community (Sadc), as international pressure mounts on Mugabe to resolve his country's political turmoil and economic meltdown.
The leaders of Tanzania, Angola and Swaziland would attend the meeting in their capacity as the Sadc's troika organ on politics, defence and security, the Tanzanian government said in a statement.
