Former South African President Thabo Mbeki is due in Harare for further mediation aimed at breaking the political impasse in Zimbabwe.
The government and the opposition MDC remain deadlocked over a decision by President Robert Mugabe to allocate key cabinet posts to his own Zanu-PF party.
Opposition leader Morgan Tsvangirai has threatened to pull out of a power-sharing deal agreed last month.
Zimbabwe's government says Mr Mugabe's actions do not violate the agreement.
A government list published on Saturday gave the main ministries, including defence, home, foreign affairs, and justice to Zanu-PF.
The country's ambassador to the UN, Boniface Chidyausiku, told the BBC that the post of finance minister was still open for negotiation.