The latest discovery takes the number of dead vultures to 20 in two weeks.
Among the birds killed many are the critically endangered African Whiteback vulture.
Brent Coverdale, animal, mammal and bird scientist at Ezemvelo KZN Wildlife, said their investigations revealed that the birds were to be used for traditional medicine.
“The poisoning of animals has a devastating effect, as it is indiscriminate and could kill many animals in one go. Last year, up to 87 vultures were killed in one poisoning event. It is highly concerning,” Coverdale said.