The incident occurred in Phulabai Kheda village under Swaroopganj police station area where the parents of the children were working, when the hut caught fire due to unknown reasons, police said.
The deceased were identified as Cheeka (6 months), his brother Raju (3 years) and a girl Cheeku (2 years), police said, adding the bodies were handed over to family members after postmortem.