Investigators are examining alleged safety violations, missing approvals and unauthorised room expansion after the deadly blaze that claimed 21 lives in south Delhi.
The incident triggered an immediate check by airport security and the Delhi Police.
The incident occurred around 11:09 p.m. near Chhotu Halwai Shop in V Block, Naveen Shahdara, after police received a call reporting gunfire.
He joined the investigation on Thursday evening at Jamia Nagar Police station after a Delhi court granted interim protection from arrest.
