Emergency medical services and rescue workers are searching a mountain in the Cathcart area of the Eastern Cape following reports of a light aircraft crash at about 14:00.
Preliminary reports show that a helicopter has landed on the mountain and rescue workers are attempting to get to the crash site on foot.
Visibility is poor due to a fire on the mountain, presumably caused by the aircraft crash. Rescue workers are waiting for fire fighters to get the blaze under control before continuing on foot.
Already, four people have been killed in 16 incidents involving light aircraft in the Eastern Cape since January.
This is according to Civil Aviation Authority figures recorded between January and September.
The death toll is up from last year when 17 incidents occurred and one person died.