New bid to ease Zimbabwe crisis
Almost half Zimbabwe's population need food aid
Another effort is being made to resolve the political deadlock in Zimbabwe with a special summit in Pretoria attended by Southern African heads of state.
President Robert Mugabe's Zanu-PF party and the opposition MDC signed a power sharing agreement last September.
But they have been unable to agree on forming an inclusive government.
Zimbabwe is in a state of economic and social collapse, and nearly 3,000 people have died as a result of a cholera epidemic.
There's scant hope that Monday's regional summit will lead to the formation of a power sharing government in Zimbabwe.
It's the fourth such meeting since the inconclusive elections in March 2008.
A week ago, Robert Mugabe and Morgan Tsvangirai met in Harare, and failed to resolve their differences.
One analyst says those talks collapsed in "real acrimony".
The main issue of contention is over who controls key ministries and other top public posts. President Mugabe has said he won't compromise any further.
If there's still no agreement on Monday, he may ask the regional grouping SADC for the legitimacy to form a new government without the MDC opposition.
SADC - which has called this emergency summit - looks powerless and has shown no willingness to impose sanctions on Zimbabwe.
South Africa's foreign minister has said any solution lies solely in the hands of Robert Mugabe and his political rivals.