Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. South African, Nigerian Presidents Vow Cooperation After Xenophobic Violence Anita Powell JOHANNESBURG - The leaders of Nigeria and South Africa have pledged to take "concrete measures" to stem future outbreaks of xenophobic violence, during a state visit to South Africa by Nigerian President Muhammadu Buhari. Nigeria's president described his Thursday meeting with his South African counterpart, Cyril Ramaphosa, as a tĂȘte-Ă -tĂȘte, a polite contrast to the anti-immigrant violence that swept South Africa last month, resulting in the deaths of at least 12 people, most of them South African nationals. 'Concrete measures' The violence prompted Nigeria to repatriate hundreds of citizens, and for Buhari to declare, after a private meeting with Ramaphosa, that the two countries would do more to stop future outbreaks. .