Faults in the rail tracks caused the derailment of six bogies and the locomotive of Rangpur Express near Ullapara Railway Station here on November 14, finds a probe body.

Abdullah Al Mamum, chief of the five-member probe panel formed by the Bangladesh Railway West Zone, on Monday evening said they submitted the report to the authorities concerned in time.

He said they found the evidence of the faults in the rail tracks after visiting the spot, talking to witnesses and interrogating railway officials and employees.

Earlier, another probe panel submitted its report blaming the faulty tracks for the accident.

Meanwhile, three more investigation committees are yet to come up with their reports.

Six bogies and the locomotive of the train derailed near the station on 14 November. Later, three of those went up in flames immediately.