According to police, Ramanathan is said to be running a paper tube manufacturing unit. He has allegedly been manufacturing illegal explosives, believed to be firecrackers, and had stored them at his residence. However, on Monday evening, a fire broke out in his apartment, causing the whole building to collapse within minutes, said police. Two people, Velmurugan and Manoj Kumar, who sustained grievous burn injuries have been admitted at the Government General Hospital in Sivakasi. Three others, who the police assume are women, are trapped under the debris.