India, June 11 -- A day after four people died and at least nine were injured when two overcrowded suburban trains passed each other near Mumbra, a scratch mark on one of the train's coaches is among the focus areas of a five-member committee formed by Central Railway (CR) on Tuesday to investigate the incident.

Officials said the committee has begun studying various possible reasons that could have led to people falling off the two trains. Of the 13 victims, two-Vicky Mukhyadal, 34, and Manish Shah, 44-were travelling on the CSMT-Karjat fast local towards Kalyan, while the remaining 11 were headed towards Thane on the Kasara-CSMT fast local.

As public and political criticism mounted following the mishap, CR on Tuesday appointed a five-...