President Cyril Ramaphosa and Rwandan President Paul Kagame held a telephonic discussion about the escalating conflict in the eastern Democratic Republic of Congo (DRC).
Government officials in the DRC have announced that the national army now controls most of Goma, but the M23 rebels maintain that they are in charge of the town.
Last week, nine South African National Defence Force (SANDF) members were killed when the M23 was advancing towards Goma.
In the discussion, Ramaphosa and Kagame agreed that a ceasefire must resume and peace negotiations must begin.
Last year, the two leaders met in Rwanda during the commemoration of the 1994 genocide and the conflict in the DRC was the main focus. Both leaders agreed that only a peace process can bring a lasting solution to the conflict in the DRC.
VIDEO | Ramaphosa discusses concerns over the escalating conflict in the DRC with Kagame: