The International Organization for Migration has warned that Sudan's Al Obeid could face the same fate as Al Fasher if attacks by the paramilitary RSF continue.
Parliament speaker Ghalibaf says talks with Washington stalled after tit-for-tat strikes, but insists the memorandum text now includes protections for allied territories and forces.
Nigeria has said that two of its nationals were killed in June in South Africa following anti-immigrant protests targeting African workers in the country.