President Robert Mugabe and opposition leaders have signed a deal under which Zimbabwe's president of nearly three decades will cede some power, the Associated Press reported. South African President Thabo Mbeki says Mugabe will be president in the new government, while main opposition leader Morgan Tsvangirai is prime minister. Mbeki says a smaller opposition group's leader Arthur Mutambara is deputy prime minister. The deal signed Monday is the result of three months of difficult negotiations mediated by Mbeki at the behest of the Southern African Development Community. Leaders of the 14-member regional bloc and of the African Union were at Monday's signing ceremony.