The consulate urged the expected Nigerian nationals to come along with their clearance certificates, as well as other documents used during the screening process.
The consulate warned Nigerian residents in South Africa against physically engaging with demonstrators.
The latest advisory came amid growing xenophobic tensions in South Africa, where at least two Nigerian citizens were killed.
Nigeria’s consul general in Johannesburg called for sustained promotion of African unity as a pathway to meaningful growth and development across the continent.
Nigeria has condemned the killing of two Nigerians, Amaramiro Emmanuel and Ekpenyong Andrew, by South African National Defence Force operatives on Saturday, in Port Elizabeth.
