It has been found in the police investigation that Babu Khan has invested money made in India through illegal activities in real estate and commercial projects in Bangladesh. Although Khan has been illegally living in India for over three decades, he owns a residence and an under-construction shopping mall in Bangladesh.
Bowbazar is one of the most crowded areas of Kolkata. At the time of the explosion, about 125 people were believed to be living in the two apartment blocks that collapsed.