Crime scene experts are still combing the scene in Constantia where the bodies of four people were discovered on Thursday morning.
At around 08:20 the bodies of two females and two males estimated to be aged between 40 and 50 were discovered with gunshot wounds.
The victims are believed to be of Bulgarian descent.
Police were summoned to the crime scene after the discovery was made. The motive for the multiple murders is yet to be determined, with detectives hard at work in search of clues.
Serious and Violent Crime detectives have initiated an investigation into the murders.