Paramedics confirmed the deaths of the victims, identified as Johanna Seanego (mother), Matome Seanego (sister), and Tebogo Mashilo Seanego (nephew).
The police were alerted to the domestic violence situation at the residence, where the son allegedly attacked his mother with an axe and then targeted his sister and nephew.
The authorities arrived at the scene and promptly arrested the suspect near his home.
The motive behind the killings remains unknown, according to police spokesperson Malesela Ledwaba.
Provincial Police Commissioner Thembi Hadebe expressed shock and dismay at the tragic incident.
She praised the police for apprehending the suspect, emphasizing that he must face the consequences for his alleged horrific actions.