Three others, including a woman, were also injured in the shooting.
The councillor was gunned down in full glare of the public shortly after attending a council event on Thursday evening.
Maluleke promised that more arrests could be expected pending the on-going investigation into the mushrooming of illegal drugs.
They face charges of being in possession of an unlicensed firearm and ammunition.
A tourist from the Netherlands has been nabbed after R5m worth of drugs were found in his possession in an Uber he was travelling in.