About 640 Nigerians have signed up to take free flights home from SA after xenophobic attacks on foreigners, a spokeswoman for Nigeria's president said.
President Muhammadu Buhari urged Nigerians "to go out and vote", promising that there would be adequate security for Saturday's postponed election.
The death toll from an attack last week by gunmen in northwestern Nigeria has doubled to more than 130, the Kaduna state governor said.