A person size hole was discovered on the roof of one of the coaches of Salem-Chennai express, when the train pulled into Chennai early in the morning on Tuesday. Nearly 200 boxes of used currency notes, which are to be deposited with the Reserve Bank of India, were in the coach and Rs 5 crore in cash was found missing from the express that started its journey from Salem, western Tamil Nadu. As per the media reports, it is not clear that the robbers were stationed on the express and then used the hole to exit with the cash or they entered the train with the help of the hole on the roof.