Officials in the Railways revealed that such incidents have been taking place with alarming regularity across zones, with the Delhi division alone spending over Rs 3.50 lakh every month in replacing broken window panes in prestigious trains like Shatabdis and Rajdhanis.
Delhi division on an average replaces 122 window panes in Shatabdi trains (each pane costing Rs 2,096) and 50 window panes in Rajdhani trains, each glass sheet costing Rs 1,900.

And the exercise is repeated month after month.
"The irony, however, is that most of the incidents involving stone pelting go unreported," a senior railway official said, adding that only six such incidents were reported last year.
The Punjab-Haryana section only reported two incidents of stone pelting in the last two year, he claimed.

Observing that the Railways have become a soft target and come under attack for every reason, he, however, felt the recent incident will definitely prod the administration to deal tough with the issue.

A senior RPF personnel in Delhi division, under whose jurisdiction the incident took place, said they were already on the job of stepping up vigil along railway tracks.
"We have identified places where speed restrictions are in place for extra vigil by RPF and GRP personnel soon after the incident.
Besides, we have also decided to identify black spots (places prone to such attacks) and conduct raids," he said, adding, "special drives will also be carried out during VIP movements."

He said the two teenage boys detained by police for allegedly pelting stones at the train admitted that they did it "out of pure fun". They are now lodged in a child reform home.