India, Sept. 9 -- A predawn explosion in an air-conditioning unit turned a Faridabad home into a death trap on Monday, suffocating a couple, their 13-year-old daughter and their pet dog, while their 24-year-old son survived after leaping through shattered glass to the terrace of a neighbouring house.

The blaze, which broke out around 3am in Block B of Green Field Colony, filled the four-storey building with thick, poisonous smoke, officials said, trapping the family of four that lived on the second floor.

The victims were identified as Sachin Kapoor, 52, his wife Rinku, 46, and their daughter Sujan, 13. Their son, Aryan, a student in Dehradun, sustained fractures after jumping from near the terrace door to escape.

Investigators said th...