Four people were killed and seven injured in a blast that occurred in a compressor room of the CNG Filling Station near North Nazimabad Board Office in Karachi.
24News HD TV Channel reported on Friday, the explode was occurred when the gas was filled in the gas in the compressor room.
Bomb Disposal Squad head Abid Shah told the media that there was no gas exhaust in the compressor room at the CNG Filling Station.
The rescue officials said that most of the injured persons were motorcyclists who were standing there for filling the petrol in their vehicles.
Panic was spread among the masses after the heavy blast and glasses of windows and doors were broken.
The rescue teams shifted the injured persons to the hospital for treatment.