A 64-year-old man from Diepsloot in Soweto is still in hospital following his suicide attempt last week.
Police Spokesperson Lieutenant Colonel Mavela Masondo says the man is under police guard for allegedly killing his wife and two of his three children.
He says on Thursday last week police arrived at the crime scene and found a 29-year-old woman and three girls with stab wounds to the chest.
Masondo says the woman and two children, aged one and six were declared dead on the scene while a four-year-old was rushed to hospital.
The 64-year-old suspect sustained injuries after he tried to hang himself.
He is being charged with murder and attempted murder and will appear in court once he is discharged from prison.
