Meanwhile, the SA Local Government Association (Salga) has condemned the attack on Matshogo, saying "there is absolutely no justification for such violence".
"While the motive for this incident is still under investigation, Salga finds its occurrence particularly regretful as the local government sphere has created a number of platforms where communities are afforded the opportunity to raise their concerns and dissatisfaction," Salga said.
It said that such incidents increase the fragility of local governance.
"Salga calls for law enforcement agencies to leave no stone unturned in their search for those responsible. Whatever the reasons maybe, a crime of such heinous nature needs to face the full might of the law," it said.
Sowetan had spoken to a relative of the 58-year-old councillor shortly after the incident.
The relative, who did not want to be named, said the family was in the dark about why he had been attacked.