More than 150 international rights groups have petitioned African governments and the African Union to act on what they call a humanitarian crisis in Zimbabwe.
President Robert Mugabe's government drew global criticism over its demolition of urban slums earlier this year.
The United Nations said Mugabe's Operation Restore Order has destroyed the homes or jobs of at least 700,000 people and affected the lives of nearly 2.5 million others.
The United Nations meanwhile protested Zimbabwe's eviction earlier this week of hundreds more people from a slum in the capital city of Harare that previously had been cleared of residents.
