He said people's anger reached boiling point when a van was spotted driving around the area with goats belonging to locals.
Mahlangu said a group of people mobilised and started burning properties that belong to people they suspected were behind thefts.
A resident, who asked not to be named, said he was angry because his family had lost 38 cows through the years.
"The only solution for us is to kill the people who are doing this. There is no other way," he said.
Another local said they resorted to mob justice because police were not doing anything about the problem.
"It is not over yet. The problem is that police are now disturbing us from finishing what we've started. But they can't stay here forever. Sooner or later they will have to leave and (we) will start again," the man said.
A 45-year-old woman whose house was burnt down said she was afraid to continue living in the area.
The woman's house was completely gutted after she fled with her two children.
"I lost everything. We left the house with nothing but the clothes we were wearing that night," she said.
Police spokesman Lieutenant-Colonel Moatshe Ngoepe warned people against taking the law into their hands.