Police Constable's wife poisoned herself and her four children due to domestic quarrel as a result four children among three daughters and one son died on the scene, while Munaza wife of Police Constable Riaz-ud-Din has been admitted in critical condition in Jinnah Hospital. According to details Police Constable's wife Munaza owing to some domestic dispute injected her four children with poison on early Friday, as a result, Aneeza 7, Faria 5, Riaya 4 and Nauman 3 years of age died on the scene and after poisoning the children the woman also injected herself with poison but she managed to survive and was taken to the hospital in critical condition. Relatives and neighbors of the unfortunate family disclosed that there has some controversy between husband and wife and it has also been learnt they live in a joint family system and the wife had been forcing her husband to live separately and last night they also exchanged harsh words with each other and on early Friday, when constable Riaz-ud-Din went to his duty Munaza first injected her children with poison and later also injected herself. While Police Constable Riaz-ud-Din, who has been deputed in Qurban Police lines as Constable informed that he and Munaza had been married for the last 11 years and there was no dispute among them, and his wife Munaza was a medical-nurse by profession. Doctors of Jinnah hospital said that they are doing their best to save the life of Munaza adding that she has been admitted in the hospital in very critical condition.