HARARE, Zimbabwe, July 21, SPA -- Opposition officials sayZimbabwe's president and opposition leader are expected tosign an agreement to hold power-sharing talks. The officials say mediator President Thabo Mbeki of SouthAfrica is scheduled to arrive in the Zimbabwean capitallater Monday for the signing, the Associated Press reported. The agreement sets out conditions for talks to form aunity government to help resolve Zimbabwe's political andeconomic crisis.--SPA www.spa.gov.sa/575717