At 10:30 pm, he put his mobile phone on the charger and placed it on top of the microwave. The rest of the family had already gone to sleep. It seemed that the mobile phone overcharged and by overcharging it got heated up which caused it to blow up.
Since the whole house had been completely air sealed and centrally air-conditioned, the chemical gas or the vapors which were coming out of the blown-up mobile phone started to spread out all across the house while everyone remained fast asleep clueless as to what was happening.
They started inhaling the toxic fumes for a while and then slowly they started to suffocate, the father woke up and tried to open the windows. The entire house was without air at this point.
Nobody knew what had happened until the driver came at 6.30 AM in order to pick the girls up from school. He rang the doorbell and called them for an hour. After this, he realized something was wrong.
Amidst the black clouds, the relative saw his uncle sitting on the chair, having already passed away. Following the uncle, he saw the little girls lying on the floor and they too had passed away. The same happened to the wife of the uncle as well.