The Commission of Railway Safety (CRS) probing the triple-train accident in Odisha's Balasore has submitted its report to the Railway Board, sources said on Thursday.
Apart from a CRS probe, the CBI is also investigating the tragic incident.
Since the accident, the Railways has transferred several top officials of the South Eastern Railway under whose jurisdiction the tragedy occurred.
Initial probe had suggested a signalling interference, either by negligence or by intent as the probable cause of the accident.