The Government Railway Police (GRP) Monday booked two Central Railway engineers 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. The GRP, which had investigated the accident, has blamed the incident on negligence of the two officials — a senior section engineer and a section engineer. The accident occurred when two overcrowded local trains passed each other on a sharp curve between Diva and Mumbra stations, leading to passengers falling off the trains. Story continues below this ad The Central Railway had also conducted an inquiry which stated that the accident was triggered by the “protruding” backpack of a commuter standing on the footboard of one train brushing against passengers on another train moving in the opposite direction. This contact led to a domino effect, causing several people to lose balance and fall from the moving trains, as per theCR inquiry, which did not blame any official for the incident. CR’s Chief Public Relations Officer Swapnil …