Two Central Railway engineers have been booked in connection with the June 9 Mumbra train accident in which four commuters died and nine others were injured after falling off two overcrowded local trains in Thane, a police officer said on Monday.

The mishap occurred between Diva and Mumbra railway stations when two trains, one bound for Kasara and the other for Chhatrapati Shivaji Maharaj Terminus, were passing each other on a sharp curve. According to police, several commuters standing on the footboard fell onto the tracks after their backpacks brushed against each other.