35-year-old Kanta Devi, her 2-year-old son Niteesh Kumar and 3-year-old daughter Geetanjali were buried under debris when the house collapsed at Tondwa in Doda town in the evening, police said.
Kanta and Niteesh died on the spot, while Geetanjali received minor injuries, they said, adding that the bodies of the victims had been recovered and the injured girl hospitalised.
The house collapsed due to cracks it developed during yesterday's earthquake, they said.