Africa Hinterland was an overland travel company set up in the UK in the early 1980s to smuggle arms into South Africa for the military struggle against the apartheid system. It was founded by exiled members of the African National Congress and made over 40 trips into South Africa by truck, carrying up to a ton of weapons on each trip hidden in secret compartments welded under the truck seats.
The operation was never exposed at the time, and was revealed several years after the last trip had run. The story was told in the documentary film, "The Secret Safari" made in 2001, directed by Tom Zubrycki and produced by David Max Brown and Sally Browning. - (Sourced from Wikipedia).
How many innocent civilians were killed by the 40 tons of guns and ammunition smuggled into South Africa?
The Africa Hinterland operation continued to operate after Nelson Mandela's release in February 1990, and for three years after his speech in August 1990 when he announced the cessation of the movement of men and arms into South Africa. Technically, this constituted a contravention of the Pretoria Minute.
Significant caches of these arms and ammunition were still being dug up in 1995, a year after South Africa's first democratic election.