Sources today said all the members of a family complained of pain in stomach since morning on February 27 after consuming meals.
They became weak and administered themselves dextrose injection at their residence, it was learnt.
Later the youngest in the family, three-year-old Thangveli, was found dead on her bed. The condition of two other family members - Delili (17) and Beiryuto (12), who were rushed to Saiha Civil Hospital, was stated to be stable, sources informed.
Medical Superintendent at Saiha Civil Hospital Dr Harry said over phone that they would be released tomorrow.
On one hand, the family blamed the food items consumed during dinner that included mustard, tomato, dal and zawngtah (parkia roxburghii), commonly found in most families' meals, for their illness.
On the other hand, the hospital officials said, ''There are reports that they consumed tumbu (banana flower) and khanghu (acacia pennata) cooked together, a leftover from previous meal, without properly heating them. This could be the reason.''