Five men were arrested for allegedly killing five rhino in the Hluhluwe area, KwaZulu-Natal police said on Monday.
The men, aged between 20 and 64, were arrested on Saturday after police received a tip-off, Captain Thulani Zwane said.
The rhino were poached this month.
Two rifles and 93 rounds of ammunition were recovered by police.
Zwane said the men faced charges of rhino poaching and possession of unlicensed firearms and ammunition.
The men were expected to appear in the Mtubatuba Magistrate's Court on Monday.