The bus in which a 23-year-medical student was gang-raped and assaulted was used by two schools in Delhi to transport school children. One of the schools, Birla Vidya Niketan in south Delhi, has now cancelled the contract with Yadav travels, owned by a man named Dinesh Yadav, which had supplied six buses to it including the one used for Sunday's crime, according to sources. The school is now making alternate arrangements for transportation of its students, the sources added.