Mozambique conducted its own medical investigations on victims of the crash. The investigations revealed that unknown people interfered with six bodies people who died during the crash. The bodies were found to have been cut and stitched up on the side of the neck. The incisions, about seven centimetres long, were made with a sharp instrument on one or other side of the neck, along the line of the cleido mastoideo muscle.
The affected bodies, included those of a Soviet crew member, President Samora's two Cuban doctors, two Mozambican stewardesses and a functionary of the Mozambiquan Foreign Ministry. The investigation failed to determine the precise time at which the cuts had been made. It further indicated that the cuts were not the cause of death. A South African, Prof. Nel, strengthened the theory that the cuts had been made to collect blood samples, but declared also that it was not normal procedure.