A senior police officer said a complaint that the boy had gone missing was received at Okhla Phase III police outpost on April 2, following which a case was registered.
The men were allegedly trained by an Inter-Services Intelligence (ISI) agent through social media to disturb communal harmony in the state.
The accused absconded as soon as he got the information that the matter was reported to the police.
The accused -- identified as a cabbie from Byculla, Rafiq Khan -- and the victim were known to each other and he molested her after an alteration over money in the train.
Doctors said the scissors were barely 2-3 millimetres from the woman's brain
Tej Pratap Yadav and Aishwarya Roy's engagement ceremony will be held later this month but the marriage will take place only next month.