Why fire went out of control in Surat coaching, explained

In what can be described as shocking news, it is being reported that the students in the coaching center in Surat used to sit on tyres doubled up as chairs. This is said to be the primary reason behind the fire going out of control. At least 20 students were killed and several others injured as a massive fire broke out on the third and fourth floor of a coaching centre building in Sarthana area of Surat in Gujarat.