Police have lodged a first information report (FIR) in the incident.

No arrests have been made so far.

According to officials, the deaths occurred because the building had no ventilation, reports Dawn News.

Today, the police registered a case at the Sharea Faisal police station. It stated that an inspection of the site revealed the six-storey building did not have an emergency exit or a fire alarm system, and it was suspected that the blaze erupted due to a short circuit, the newspaper reported.

The FIR, a copy of which is available with Dawn News, said a detailed probe would be conducted spanning over the aspects of: approval of building’s construction, clearance of map and plan, connivance of K-Electric and other organisations, negligence and use of substandard material.

It invoked Sections 322 (manslaughter), 436 (mischief by fire or explosive substance with intent to destroy house, etc), 427 (mischief causing damage to the amount of fifty rupees), 288 (negligent conduct with respect to pulling down or repairing buildings), 285 (negligent conduct with respect to fire or combustible matter) and 34 (acts done by several persons In furtherance of common intention) of the Pakistan Penal Code, the Pakistani newspaper reported.

Separately, Karachi East Senior Superintendent of Police (SSP) Syed Irfan Bahadur told Dawn News police would initiate further legal proceedings after experts determined the exact cause of the fire and other contributory factors.