JOHANNESBURG (AP) — Zimbabwe's President Robert Mugabe has arrived in South Africa as his wife is accused of assaulting a young model. Mugabe flew into Waterkloof Air Force Base in Pretoria with his entourage late Wednesday night, apparently to help his wife with the ongoing scandal. The Zimbabwean president arrived early for a regional summit of southern African nations. South Africa's police minister says a "red alert" has been issued to prevent Grace Mugabe from leaving the country before she settles the accusation that she assaulted a young model. The African News Agency reports that Minister of Police Fikile Mbalula said that all borders have been notified not to permit Mugabe from leaving the country until the matter is resolved.