The head on collision between the Virar-bound and Churchgate-bound train at Andheri station on Saturday night is reported to have occurred because of a system failure.
“The accident might have taken place because the control tower did not inform the driver that the signal for his train had changed,” said a Western Railway (WR) official requesting anonymity, as the official inquiry report is still awaited.
The railway safety commissioner, Chetan Bakshi, has asked for a report on the accident that injured 10 commuters. Suburban services on WR were disrupted and many services remained cancelled on Sunday.
On Saturday, there was chaos after the incident as thousands were stranded after 11.05pm.
Though there was no official communication from the WR administration regarding the cause of the accident, a senior official denied human error.
As a head-on collision is very unusual, the commissioner will conduct the inquiry into the accident. A WR spokesperson confirmed this, saying the dates for the public hearing will be announced soon.
The railway board chairman Vinay Mittal was in the city to review safety and other protocols when the accident happened. Mittal, along with Mahesh Kumar, general manager of WR, visited the spot and took stock of the situation after which the probe was ordered.
Three coaches of Churchgate-bound up fast train were derailed in the accident. An overhead portal was also damaged. It took more than six hours for the WR to clear all four tracks and resume services.
“Services on the down slow and up fast lines were restored at about 12.30 am. The derailed coaches were re-railed at 2.30 am and services on all four lines were restored at 5.30 am,” said a WR press release.