Original:  Inspector General of Police (Law and Order) Raj Kanojia said that the fire was broken out at about 3 am when the victims were inside the factory and all the doors were closed.
Revised:  Inspector General of Police (Law and Order) Raj Kanojia said that the fire was broken out at about 3 a.m. local time, when the victims were inside the factory and all the doors were closed.
Edit intent: clarity