According to Lahore police, the incident took place in Akbari gate, area of Lahore when the house caught fire due to burning candle.
Those killed in the fire include a boy Hammad and a girl Laiba - aged 3 and 4 years.
Police said that the Illyas, a hat maker, burnt a candle and went out of home for some work. Meanwhile, the fire erupted in the house. All the two children died on the spot.