India, May 15 -- NEW DELHI

A private Bihar-registered bus, inside which a 30-year-old woman was allegedly gangraped by two men on Tuesday, had tinted windows, heavy curtains and no location tracker in violation of rules and guidelines, police said on Thursday.

The bus allegedly took an 8km route in outer Delhi that crossed at least two police booths, HT found.

In 2012, the Supreme Court prohibited the use of black films or any other material (such as curtains or mesh) upon safety glass, window screens and side glass of all vehicles. In 2016, the ministry of road transport and highways issued a notification mandating vehicle location tracking devices and emergency buttons in all public service vehicles. These two features were absent in...