Erode:
A woman killed her three children by adminstering poison in their beverage and later committed suicide in the same manner at Kadaganalli near Sathayamangalam forest area in the district, police said.
They said the woman took the extreme step after a heated argument with her husband yesterday and after he had left for work in his field. When he returned in the evening, he found all of them lying unconscious and raised an alarm.
Though neighbours who rushed to the spot took them to a hospital, they died en route, police said.