According to rescue workers, it appeared that someone had tried to light a candle subsequent to the gas leakage, which ignited the fire that soon spread to two other rooms of the house, killing the children.
The mother of the deceased children survived the accident but is said to be severely injured.
Sarfaraz, a police constable, the father of the expired children locked the house daily before going to work. He had recently purchased a house in another locality and the night of the accident was the family's last night in the house.
The victims include seven-year-old Faraz, five-year-old Malaika, three-year-old Kainat and two-year-old Ali.
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