Police in Bloemfontein are investigating three suicide cases reported this week.
The Police and Prisons Civil Rights Union (Popcru) says the matter around suicides within the police force is at an alarming level.
Suicides by mentally-ill patients are on the increase in correctional centres, nationwide.
The South African Depression and Anxiety Group (Sadag) says suicide is not the answer to any problem, and help is available.
At least 100 people are murdered in Johannesburg alone with the banned pesticide Aldicarb every year. This is according to poison expert Gerhard Verdoorn, who says the poison known colloquially as Two Step and in Sotho, Halipirimi, is responsible for at least 800 dog poisonings every week in South Africa.