The Commissioner of Railway Safety here has confirmed the forensic findings that the fire in Chennai-bound Tamil Nadu Express, which resulted in the death of 30 passengers on July 30, was on account of bursting of fireworks in the S11 bogie.

Commissioner of Railway Safety Dinesh Kumar Singh, who conducted a statutory inquiry into the fire, said the accident was caused by “accidental igniting of fireworks.”

The Andhra Pradesh State Forensic Science Laboratory gave a similar report a few days ago, but failed to identify the initiation of fire.

Its report said materials that went into the making of fireworks were found from among the remnants of the burnt bogie.

The railway police, however, refused to consider the report as final for going ahead with the investigation. Its senior officials said the forensic findings were only an input for further investigation. They added that circumstantial evidence would also be analysed before arriving at a conclusion.