His attraction towards incendiary material started in his childhood -- while he was in school and keenly observed a 'chooranwalah' doing tricks, like cracker-type fire and explosion, using potash, sugar and acid, said police after questioning him for a day.u00a0

"When he was aged 12, Tunda observed 'Chooranwalah' sprinkling acid on a mixture of potash and sugar to produce fire. He developed this principle to make bombs," Joint Commissioner of Police (Special Cell) Madan Oberoi told IANS.