Police sources said that the incident took place in Kirsiya village panchayat where the portion of the mud house collapsed late on Sunday night.
"Mohammad Haleem (65), his grandson Fiyaan (9) and granddaughter Samaira (6), who were sleeping in the room were buried under the debris," they said.
Police sources said that the family members removed the debris with the help of the neighbours but Fiyaan and Samaira had died by that time.
"Haleem, who sustained serious injuries was referred to the district hospital. His wife Nariman also sustained injuries after being hit by debris," they said.
(With UNI inputs)