MUMBAI: More than 24 hours after the Monday morning rush hour Mumbra tragedy in which four commuters died and nine others were injured — some after falling off two passing local trains and others while inside the compartment — Central Railway (CR) is still to conclusively determine what led to the unprecedented accident on the city’s suburban railway network, reports Manthan K Mehta. In the absence of clear CCTV footage or inconclusive eyewitness accounts, the cause remains a mystery.CR on Tuesday set up a five-member committee of senior officials to investigate, but did not specify a deadline. They will examine all possibilities, including overcrowding, brushing of bags, possible quarrels, or passengers on footboards losing balance at a curve. Cops tracked another man injured in the incident to a private hospital in Diva, taking the count of injured to 10. Central Railway on Tuesday set up a five-member committee of senior officials to investigate the sequence of events leading to the Mumbra tragedy. The probe panel includes the senior divisional security commissioner, senior divisional mechanical engineer, senior divisional electrical engineer, senior divisional engineer, and the senior divisional operations manager. CR’s chief public relations officer Swapnil Nila said, “There is no fixed deadline, but the committee has been asked to submit its findings at the earliest.”A senior RPF official said, “We have reviewed CCTV footage from the platform, but it doesn’t offer much insight as the view was blocked by the trains themselves.”Adding to the mystery, officials said even the injured commuters have been unable to provide clear accounts of how they fell. “There is talk of passengers being flung and colliding with the opposite train, but nothing is confirmed yet,” an official said.The incident occurred at the Diva end near Mumbra rilway station. Preliminary observations suggest the incident occurred when two fast locals—a Kasara-CSMT train and a CSMT-Karjat one—crossed each other ahead of the curve. It is suspected that shoulder bags or luggage brushing against passengers could have destabilised those on the edge.CR has not imposed any additional speed restrictions on the stretch following the accident.Of the 13 commuters involved in the mishap, 11 were aboard the Kasara-CSMT fast local, while two were on the CSMT-Karjat train. Of the deceased, Vicky Mukhyadal and Mayur Shah were in the CSMT-Karjat train, while Ketan Saroj and Rahul Gupta were travelling on the Kasara-CSMT local.An official said scratch marks were found on the exterior of the Kasara-CSMT train’s last coach. “It appears that a passenger’s bag may have grazed the coach of the opposite train, which may have triggered the incident,” the official said.Meanwhile, the local staff from Mumbra railway station who attended to the mishap victims are likely to be called in for questioning. The railway police, guided by the assistant commissioner of police, railways, CSMT, on Tuesday inspected the spot where the victims were found following the mishap to look for clues. – Inputs by Manoj Badgeri