South Africa’s foreign affairs spokesman says Zimbabwe’s president and opposition leader will sign an agreement to hold power-sharing talks.

The agreement sets out conditions for talks to form a unity government to help resolve Zimbabwe’s political and economic crisis.

Ronnie Mamoepa says the signing will take place in Harare on Monday afternoon in the presence of mediator South African President Thabo Mbeki.

Mamoepa says the signing is “a positive step forward in the ongoing dialogue” to resolve Zimbabwe’s political and economic crisis.

Opposition leader Morgan Tsvangirai won most votes in March elections but pulled out of a June runoff against President Mugabe because of escalating state-sponsored violence against his supporters.