A North West mother killed herself and her four sons after drinking poison near Coligny at the weekend.
The 38-year-old mother drank the poison following an argument with her husband on Saturday night.
The poison, which gave off a toxic gas, was inhaled by her four sons.
North West police spokesperson Adele Myburgh says the husband and two other sons are in a critical condition in hospital.
"The mother woke up during the night and allegedly drank poison and spread it throughout the house.
"As a result, the mother and her four sons died while the 35-year-old father and two sons, aged 8 and 17 were admitted to the hospital for medical treatment.
"Investigation into the matter continues."