Thousands of demonstrators press an unofficial deadline for undocumented migrants to leave South Africa, prompting mass departures and repatriations organized by several African governments.Anti-immigrant groups including March and March, Operation Dudula and Progressive Forces drive the campaign while President Cyril Ramaphosa condemns violence and says immigration enforcement is a state responsibility.The South African Police Service is deploying thousands of officers in Johannesburg, Durban and Pretoria, opens more than 100 criminal cases against vigilante groups and places military units on standby to prevent further attacks.Businesses owned by foreign nationals close, transit is disrupted and unions and the South African Human Rights Commission urge peaceful work where safe while humanitarian groups press for shelter and legal protection for displaced people.