A fourth teenager has been a victim of a necklace attack in Etwatwa, near Daveyton, in Ekurhuleni on Thursday.
The community claims it is taking measures to fight crime and gangsterism in the area.
The teenager survived the attack and is currently receiving treatment at hospital, and police have not yet been able to confirm if the teenager belongs to the OVL gang, which is believed to be behind most crimes in the area.
The three men attacked in the past few days were members of the OVL gang.
Meanwhile, additional police officers have been deployed to the area.