Sources said the girl, a resident of Kolkata, boarded the Punjab-bound train at Howrah on Sunday but entered the coach reserved for army personnel by mistake.
One of the army man got her drunk and two others then raped her when she went to the bathroom.
Social workers found her unconscious on the train when it stopped in Jharkhand’s Madhupur station.
The girl was in shock and needed counselling., foreign media reports.
