MUMBAI, Sept. 29 -- Three months after the horrific June 9 accident near Mumbra, where eight passengers fell from moving trains and five lost their lives, an official inquiry has ruled out track geometry or coach clearance as the cause. Instead, the investigation, carried out by a five-member team of Central Railway (CR) has directly blamed a protruding commuter's bag that brushed against another train, triggering a deadly chain reaction. According to the report, the mishap occurred between Mumbra and Diva stations when two suburban trains-CSMT-bound N-10 and Karjat-bound S-11-were crossing each other at speeds of 72 kmph. A commuter travelling on the footboard of the Karjat-bound train was carrying a 30-cm-thick black bag that extended outside the coach. The bag struck passengers standing on the footboard of the crowded CSMT-bound train, leading to a "domino effect" that caused eight people to fall. Five of them died later in the hospital. Investigators found that the track-centre distance between the two curved fast lines was over 4,400 mm, comfortably above the 4,265 mm mandated by Indian Railways. Speedometer records showed that both trains were running within the temporary speed restriction of 75 kmph. The permissible speed at the spot is 100 kmph. Officials confirmed that friction marks were visible on coach 5341A of the CSMT-bound train, precisely where the commuter's bag made contact-near the door and window grille. "The fresh rubbing mark and hitting imprint on the window net confirm that the accident was caused by the external bag. Other possibilities such as quarrelling, sabotage, or mischief were ruled out after reviewing CCTV footage and passenger statements," another official added....