South Africa's state-run broadcaster reports that the presidents of South Africa and Angola will travel to Zimbabwe on Wednesday to meet with "stakeholders" in the political crisis, including President Robert Mugabe and the military.

Zimbabwe's Parliament has begun impeachment proceedings against Mugabe, who is accused of allowing his wife to "usurp" power and of being too old to rule.

It is not clear how long impeachment would take, though the ruling party has said it could vote Mugabe out as early as Wednesday.

South Africa, Angola and two other regional countries held a summit on the crisis Tuesday in Angola.