Four more SA National Defence Force (SANDF) soldiers have been killed in the Democratic Republic of Congo, taking the death toll up to 13. The Department of Defence on Tuesday said a mortar bomb launched by the M23 rebels landed in the SANDF base on Monday, killing three soldiers. The bomb was allegedly fired in the direction of the Goma Airport, near where the SANDF set up base. This was during a mortar exchange between the Armed Forces of the Democratic Republic of the Congo (FARDC) and the M23 militia. According to SANDF, a fourth soldier, who was injured in the battles over the past three days, succumbed to his injuries in hospital. Phemelo discusses the latest developments with Professor at the Faculty for Military Science at Stellenbosch University, Thomas Mandrup.